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  Subjects -> MATHEMATICS (Total: 1003 journals)
    - APPLIED MATHEMATICS (82 journals)
    - GEOMETRY AND TOPOLOGY (21 journals)
    - MATHEMATICS (742 journals)
    - MATHEMATICS (GENERAL) (41 journals)
    - NUMERICAL ANALYSIS (22 journals)
    - PROBABILITIES AND MATH STATISTICS (95 journals)

MATHEMATICS (742 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 538 Journals sorted alphabetically
Abakós     Open Access   (Followers: 4)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 4)
Academic Voices : A Multidisciplinary Journal     Open Access   (Followers: 2)
Accounting Perspectives     Full-text available via subscription   (Followers: 7)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 15)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 3)
ACM Transactions on Mathematical Software (TOMS)     Hybrid Journal   (Followers: 6)
ACS Applied Materials & Interfaces     Hybrid Journal   (Followers: 33)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1)
Acta Mathematica     Hybrid Journal   (Followers: 12)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 6)
Acta Mathematica Vietnamica     Hybrid Journal  
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal  
Advanced Science Letters     Full-text available via subscription   (Followers: 11)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 4)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 5)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 9)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 19)
Advances in Decision Sciences     Open Access   (Followers: 3)
Advances in Difference Equations     Open Access   (Followers: 3)
Advances in Fixed Point Theory     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 14)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 7)
Advances in Materials Science     Open Access   (Followers: 14)
Advances in Mathematical Physics     Open Access   (Followers: 4)
Advances in Mathematics     Full-text available via subscription   (Followers: 11)
Advances in Nonlinear Analysis     Hybrid Journal  
Advances in Numerical Analysis     Open Access   (Followers: 5)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Pure and Applied Mathematics     Hybrid Journal   (Followers: 6)
Advances in Pure Mathematics     Open Access   (Followers: 6)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 5)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 4)
Afrika Matematika     Hybrid Journal   (Followers: 1)
Air, Soil & Water Research     Open Access   (Followers: 13)
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 1)
Al-Jabar : Jurnal Pendidikan Matematika     Open Access   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 6)
Algebra Colloquium     Hybrid Journal   (Followers: 4)
Algebra Universalis     Hybrid Journal   (Followers: 2)
Algorithmic Operations Research     Full-text available via subscription   (Followers: 5)
Algorithms     Open Access   (Followers: 11)
Algorithms Research     Open Access   (Followers: 1)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 5)
American Journal of Mathematical Analysis     Open Access  
American Journal of Mathematics     Full-text available via subscription   (Followers: 6)
American Journal of Operations Research     Open Access   (Followers: 5)
An International Journal of Optimization and Control: Theories & Applications     Open Access   (Followers: 10)
Anadol University Journal of Science and Technology B : Theoritical Sciences     Open Access  
Analele Universitatii Ovidius Constanta - Seria Matematica     Open Access   (Followers: 1)
Analysis and Applications     Hybrid Journal   (Followers: 1)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 5)
Analysis Mathematica     Full-text available via subscription  
Analysis. International mathematical journal of analysis and its applications     Hybrid Journal   (Followers: 2)
Annales Mathematicae Silesianae     Open Access  
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica     Open Access  
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1)
Annals of Combinatorics     Hybrid Journal   (Followers: 4)
Annals of Data Science     Hybrid Journal   (Followers: 12)
Annals of Discrete Mathematics     Full-text available via subscription   (Followers: 6)
Annals of Mathematics     Full-text available via subscription   (Followers: 1)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 12)
Annals of Pure and Applied Logic     Open Access   (Followers: 3)
Annals of the Alexandru Ioan Cuza University - Mathematics     Open Access  
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1)
Annals of West University of Timisoara - Mathematics     Open Access  
Annals of West University of Timisoara - Mathematics and Computer Science     Open Access  
Annuaire du Collège de France     Open Access   (Followers: 6)
ANZIAM Journal     Open Access   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applications of Mathematics     Hybrid Journal   (Followers: 2)
Applied Categorical Structures     Hybrid Journal   (Followers: 3)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 14)
Applied Mathematics     Open Access   (Followers: 3)
Applied Mathematics     Open Access   (Followers: 7)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 8)
Applied Mathematics - A Journal of Chinese Universities     Hybrid Journal  
Applied Mathematics Letters     Full-text available via subscription   (Followers: 2)
Applied Mathematics Research eXpress     Hybrid Journal   (Followers: 1)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 6)
Arab Journal of Mathematical Sciences     Open Access   (Followers: 3)
Arabian Journal of Mathematics     Open Access   (Followers: 2)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 3)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5)
Archive of Numerical Software     Open Access  
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
Armenian Journal of Mathematics     Open Access  
Arnold Mathematical Journal     Hybrid Journal   (Followers: 1)
Artificial Satellites     Open Access   (Followers: 21)
Asia-Pacific Journal of Operational Research     Hybrid Journal   (Followers: 3)
Asian Journal of Algebra     Open Access   (Followers: 1)
Asian-European Journal of Mathematics     Hybrid Journal   (Followers: 2)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 6)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 4)
Australian Senior Mathematics Journal     Full-text available via subscription   (Followers: 1)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Axioms     Open Access   (Followers: 1)
Baltic International Yearbook of Cognition, Logic and Communication     Open Access   (Followers: 1)
Basin Research     Hybrid Journal   (Followers: 5)
BIBECHANA     Open Access   (Followers: 2)
Biomath     Open Access  
BIT Numerical Mathematics     Hybrid Journal  
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletín de la Sociedad Matemática Mexicana     Hybrid Journal  
Bollettino dell'Unione Matematica Italiana     Full-text available via subscription   (Followers: 1)
British Journal of Mathematical and Statistical Psychology     Full-text available via subscription   (Followers: 20)
Bruno Pini Mathematical Analysis Seminar     Open Access  
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 12)
Bulletin des Sciences Mathamatiques     Full-text available via subscription   (Followers: 4)
Bulletin of Dnipropetrovsk University. Series : Communications in Mathematical Modeling and Differential Equations Theory     Open Access   (Followers: 3)
Bulletin of Mathematical Sciences     Open Access   (Followers: 1)
Bulletin of Symbolic Logic     Full-text available via subscription   (Followers: 2)
Bulletin of the Australian Mathematical Society     Full-text available via subscription   (Followers: 1)
Bulletin of the Brazilian Mathematical Society, New Series     Hybrid Journal  
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 4)
Bulletin of the Malaysian Mathematical Sciences Society     Hybrid Journal  
Calculus of Variations and Partial Differential Equations     Hybrid Journal  
Canadian Journal of Science, Mathematics and Technology Education     Hybrid Journal   (Followers: 19)
Carpathian Mathematical Publications     Open Access   (Followers: 1)
Catalysis in Industry     Hybrid Journal   (Followers: 1)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
CHANCE     Hybrid Journal   (Followers: 5)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Annals of Mathematics, Series B     Hybrid Journal  
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Mathematics     Open Access  
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Cogent Mathematics     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Collectanea Mathematica     Hybrid Journal  
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 4)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Commentarii Mathematici Helvetici     Hybrid Journal   (Followers: 1)
Communications in Advanced Mathematical Sciences     Open Access  
Communications in Combinatorics and Optimization     Open Access  
Communications in Contemporary Mathematics     Hybrid Journal  
Communications in Mathematical Physics     Hybrid Journal   (Followers: 2)
Communications On Pure & Applied Mathematics     Hybrid Journal   (Followers: 3)
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Complex Variables and Elliptic Equations: An International Journal     Hybrid Journal  
Complexus     Full-text available via subscription  
Composite Materials Series     Full-text available via subscription   (Followers: 8)
Compositio Mathematica     Full-text available via subscription   (Followers: 1)
Comptes Rendus Mathematique     Full-text available via subscription   (Followers: 1)
Computational and Applied Mathematics     Hybrid Journal   (Followers: 3)
Computational and Mathematical Methods in Medicine     Open Access   (Followers: 2)
Computational and Mathematical Organization Theory     Hybrid Journal   (Followers: 2)
Computational Complexity     Hybrid Journal   (Followers: 4)
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 8)
Computational Mechanics     Hybrid Journal   (Followers: 5)
Computational Methods and Function Theory     Hybrid Journal  
Computational Optimization and Applications     Hybrid Journal   (Followers: 9)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 9)
Concrete Operators     Open Access   (Followers: 5)
Confluentes Mathematici     Hybrid Journal  
Contributions to Game Theory and Management     Open Access  
COSMOS     Hybrid Journal  
Cryptography and Communications     Hybrid Journal   (Followers: 13)
Cuadernos de Investigación y Formación en Educación Matemática     Open Access  
Cubo. A Mathematical Journal     Open Access  
Current Research in Biostatistics     Open Access   (Followers: 8)
Czechoslovak Mathematical Journal     Hybrid Journal   (Followers: 1)
Demographic Research     Open Access   (Followers: 13)
Demonstratio Mathematica     Open Access  
Dependence Modeling     Open Access  
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 31)
Developments in Clay Science     Full-text available via subscription   (Followers: 1)
Developments in Mineral Processing     Full-text available via subscription   (Followers: 3)
Dhaka University Journal of Science     Open Access  
Differential Equations and Dynamical Systems     Hybrid Journal   (Followers: 4)
Differentsial'nye Uravneniya     Open Access  
Discrete Mathematics     Hybrid Journal   (Followers: 8)
Discrete Mathematics & Theoretical Computer Science     Open Access  
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae - General Algebra and Applications     Open Access  
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
Diskretnaya Matematika     Full-text available via subscription  
Dnipropetrovsk University Mathematics Bulletin     Open Access  
Doklady Akademii Nauk     Open Access  
Doklady Mathematics     Hybrid Journal  
Duke Mathematical Journal     Full-text available via subscription   (Followers: 1)
Eco Matemático     Open Access  
Econometrics     Open Access   (Followers: 2)
Edited Series on Advances in Nonlinear Science and Complexity     Full-text available via subscription  
Educação Matemática Debate     Open Access  
EduMatSains     Open Access  
Electronic Journal of Combinatorics     Open Access  

        1 2 3 4 | Last

Journal Cover
Bulletin of the Australian Mathematical Society
Journal Prestige (SJR): 0.44
Number of Followers: 1  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0004-9727 - ISSN (Online) 1755-1633
Published by Cambridge University Press Homepage  [372 journals]
  • BAZ volume 99 Issue 1 Cover and Front matter
    • PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001478
      Issue No: Vol. 99, No. 1 (2019)
       
  • BAZ volume 99 Issue 1 Cover and Back matter
    • PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S000497271800148X
      Issue No: Vol. 99, No. 1 (2019)
       
  • NOTE ON THE NUMBER OF DIVISORS OF REDUCIBLE QUADRATIC POLYNOMIALS
    • Authors: ADRIAN W. DUDEK; ŁUKASZ PAŃKOWSKI, VICTOR SCHARASCHKIN
      Pages: 1 - 9
      Abstract: Lapkova [‘On the average number of divisors of reducible quadratic polynomials’, J. Number Theory 180 (2017), 710–729] uses a Tauberian theorem to derive an asymptotic formula for the divisor sum $\sum _{n\leq x}d(n(n+v))$ where $v$ is a fixed integer and $d(n)$ denotes the number of divisors of  $n$ . We reprove this result with additional terms in the asymptotic formula, by investigating the relationship between this divisor sum and the well-known sum $\sum _{n\leq x}d(n)d(n+v)$ .
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000734
      Issue No: Vol. 99, No. 1 (2019)
       
  • REPRESENTATION FUNCTIONS ON ABELIAN GROUPS
    • Authors: WU-XIA MA; YONG-GAO CHEN
      Pages: 10 - 14
      Abstract: Let $G$ be a finite abelian group, $A$ a nonempty subset of $G$ and $h\geq 2$ an integer. For $g\in G$ , let $R_{A,h}(g)$ denote the number of solutions of the equation $x_{1}+\cdots +x_{h}=g$ with $x_{i}\in A$ for $1\leq i\leq h$ . Kiss et al. [‘Groups, partitions and representation functions’, Publ. Math. Debrecen85(3) (2014), 425–433] proved that (a) if $R_{A,h}(g)=R_{G\setminus A,h}(g)$ for all $g\in G$ , then
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000783
      Issue No: Vol. 99, No. 1 (2019)
       
  • ON A PROBLEM OF CHEN AND LEV
    • Authors: SHI-QIANG CHEN; MIN TANG, QUAN-HUI YANG
      Pages: 15 - 22
      Abstract: For a given set $S\subset \mathbb{N}$ , $R_{S}(n)$ is the number of solutions of the equation $n=s+s^{\prime },sr\geq 0$ and that $A$ and $B$ are sets with $A\cup B=\mathbb{N}$ and $A\cap B=\{r+mk:k\in \mathbb{N}\}$ . We prove that if $R_{A}(n)=R_{B}(n)$ for all positive integers
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001107
      Issue No: Vol. 99, No. 1 (2019)
       
  • ++++++++ ++++++++ ++++++++++++ ++++++++++++++++$n$ ++++++++++++ ++++++++ +++++WITH+POLYNOMIAL+IMAGE+COPRIME+WITH+THE+ ++++++++ ++++++++ ++++++++++++ ++++++++++++++++$n$ ++++++++++++ ++++++++ ++++TH+TERM+OF+A+LINEAR+RECURRENCE&rft.title=Bulletin+of+the+Australian+Mathematical+Society&rft.issn=0004-9727&rft.date=2019&rft.volume=99&rft.spage=23&rft.epage=33&rft.aulast=MASTROSTEFANO&rft.aufirst=DANIELE&rft.au=DANIELE+MASTROSTEFANO&rft.au=CARLO+SANNA&rft_id=info:doi/10.1017/S0004972718000606">ON NUMBERS $n$ WITH POLYNOMIAL IMAGE COPRIME WITH THE $n$ TH TERM OF A
           LINEAR RECURRENCE
    • Authors: DANIELE MASTROSTEFANO; CARLO SANNA
      Pages: 23 - 33
      Abstract: Let $F$ be an integral linear recurrence, $G$ an integer-valued polynomial splitting over the rationals and $h$ a positive integer. Also, let ${\mathcal{A}}_{F,G,h}$ be the set of all natural numbers $n$ such that $\gcd (F(n),G(n))=h$ . We prove that ${\mathcal{A}}_{F,G,h}$ has a natural density. Moreover, assuming that $F$ is nondegenerate and $G$ has no fixed divisors, we show that the density of ${\mathcal{A}}_{F,G,1}$ is 0 if and only if ${\mathcal{A}}_{F,G,1}$ is finite.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000606
      Issue No: Vol. 99, No. 1 (2019)
       
  • PERFECT POWERS THAT ARE SUMS OF TWO POWERS OF FIBONACCI NUMBERS
    • Authors: ZHONGFENG ZHANG; ALAIN TOGBÉ
      Pages: 34 - 41
      Abstract: In this paper, we consider the Diophantine equations $$\begin{eqnarray}\displaystyle F_{n}^{q}\pm F_{m}^{q}=y^{p} & & \displaystyle \nonumber\end{eqnarray}$$ with positive integers $q,p\geq 2$ and $\gcd (F_{n},F_{m})=1$ , where $F_{k}$ is a Fibonacci number. We obtain results for $q=2$ or $q$ an odd prime with $q\equiv 3\;(\text{mod}\;4),3
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000916
      Issue No: Vol. 99, No. 1 (2019)
       
  • LINEAR INDEPENDENCE OF POWERS OF SINGULAR MODULI OF DEGREE THREE
    • Authors: FLORIAN LUCA; ANTONIN RIFFAUT
      Pages: 42 - 50
      Abstract: We show that two distinct singular moduli $j(\unicode[STIX]{x1D70F}),j(\unicode[STIX]{x1D70F}^{\prime })$ , such that for some positive integers $m$ and $n$ the numbers $1,j(\unicode[STIX]{x1D70F})^{m}$ and $j(\unicode[STIX]{x1D70F}^{\prime })^{n}$ are linearly dependent over $\mathbb{Q}$ , generate the same number field of degree at most two. This completes a result of Riffaut [‘Equations with powers of singular moduli’, Int. J. Number Theory, to appear], who proved the above theorem except for two explicit pairs of exceptions consisting of numbers of degree three. The purpose of this article is to treat these two remaining cases.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000965
      Issue No: Vol. 99, No. 1 (2019)
       
  • PARITY RESULTS FOR PARTITIONS WHEREIN EACH PART APPEARS AN ODD NUMBER OF
           TIMES
    • Authors: MICHAEL D. HIRSCHHORN; JAMES A. SELLERS
      Pages: 51 - 55
      Abstract: We consider the function $f(n)$ that enumerates partitions of weight $n$ wherein each part appears an odd number of times. Chern [‘Unlimited parity alternating partitions’, Quaest. Math. (to appear)] noted that such partitions can be placed in one-to-one correspondence with the partitions of $n$ which he calls unlimited parity alternating partitions with smallest part odd. Our goal is to study the parity of $f(n)$ in detail. In particular, we prove a characterisation of $f(2n)$ modulo 2 which implies that there are infinitely many Ramanujan-like congruences modulo 2 satisfied by the function $f.$ The proof techniques are elementary and involve classical generating function dissection tools.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001041
      Issue No: Vol. 99, No. 1 (2019)
       
  • IDEAL CHAINS IN RESIDUALLY FINITE DEDEKIND DOMAINS
    • Authors: YU-JIE WANG; YI-JING HU, CHUN-GANG JI
      Pages: 56 - 67
      Abstract: Let $\mathfrak{D}$ be a residually finite Dedekind domain and let $\mathfrak{n}$ be a nonzero ideal of $\mathfrak{D}$ . We consider counting problems for the ideal chains in $\mathfrak{D}/\mathfrak{n}$ . By using the Cauchy–Frobenius–Burnside lemma, we also obtain some further extensions of Menon’s identity.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001090
      Issue No: Vol. 99, No. 1 (2019)
       
  • BETTI NUMBERS FOR CERTAIN COHEN–MACAULAY TANGENT CONES
    • Authors: MESUT ŞAHİN; NİL ŞAHİN
      Pages: 68 - 77
      Abstract: We compute Betti numbers for a Cohen–Macaulay tangent cone of a monomial curve in the affine $4$ -space corresponding to a pseudo-symmetric numerical semigroup. As a byproduct, we also show that for these semigroups, being of homogeneous type and homogeneous are equivalent properties.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000898
      Issue No: Vol. 99, No. 1 (2019)
       
  • PROJECTIVE CHARACTERS WITH PRIME POWER DEGREES
    • Authors: YANG LIU
      Pages: 78 - 82
      Abstract: We consider the relationship between structural information of a finite group $G$ and $\text{cd}_{\unicode[STIX]{x1D6FC}}(G)$ , the set of all irreducible projective character degrees of $G$ with factor set $\unicode[STIX]{x1D6FC}$ . We show that for nontrivial $\unicode[STIX]{x1D6FC}$ , if all numbers in $\text{cd}_{\unicode[STIX]{x1D6FC}}(G)$ are prime powers, then $G$ is solvable. Our result is proved by classical character theory using the bijection between irreducible projective representations and irreducible constituents of induced representations in its representation group.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000825
      Issue No: Vol. 99, No. 1 (2019)
       
  • OVERGROUPS OF WEAK SECOND MAXIMAL SUBGROUPS
    • Authors: HANGYANG MENG; XIUYUN GUO
      Pages: 83 - 88
      Abstract: A subgroup $H$ is called a weak second maximal subgroup of $G$ if $H$ is a maximal subgroup of a maximal subgroup of $G$ . Let $m(G,H)$ denote the number of maximal subgroups of $G$ containing $H$ . We prove that $m(G,H)-1$ divides the index of some maximal subgroup of $G$ when $H$ is a weak second maximal subgroup of $G$ . This partially answers a question of Flavell [‘Overgroups of second maximal subgroups’, Arch. Math.64(4) (1995), 277–282] and extends a result of Pálfy and Pudlák [‘Congruence lattices of finite algebras and intervals in sub...
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000904
      Issue No: Vol. 99, No. 1 (2019)
       
  • ON OZAKI CLOSE-TO-CONVEX FUNCTIONS
    • Authors: VASUDEVARAO ALLU; DEREK K. THOMAS, NIKOLA TUNESKI
      Pages: 89 - 100
      Abstract: Let $f$ be analytic in $\mathbb{D}=\{z\in \mathbb{C}:|z|
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000989
      Issue No: Vol. 99, No. 1 (2019)
       
  • MULTIPLICITIES OF EIGENVALUES OF THE DIFFUSION OPERATOR WITH RANDOM JUMPS
           FROM THE BOUNDARY
    • Authors: JUN YAN; GUOLIANG SHI
      Pages: 101 - 113
      Abstract: This paper deals with a non-self-adjoint differential operator which is associated with a diffusion process with random jumps from the boundary. Our main result is that the algebraic multiplicity of an eigenvalue is equal to its order as a zero of the characteristic function $\unicode[STIX]{x1D6E5}(\unicode[STIX]{x1D706})$ . This is a new criterion for determining the multiplicities of eigenvalues for concrete operators.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001120
      Issue No: Vol. 99, No. 1 (2019)
       
  • A COMPACT QUALITATIVE UNCERTAINTY PRINCIPLE FOR SOME NONUNIMODULAR GROUPS
    • Authors: WASSIM NASSERDDINE
      Pages: 114 - 120
      Abstract: Let $G$ be a separable locally compact group with type $I$ left regular representation, $\widehat{G}$ its dual, $A(G)$ its Fourier algebra and $f\in A(G)$ with compact support. If $G=\mathbb{R}$ and the Fourier transform of $f$ is compactly supported, then, by a classical Paley–Wiener theorem, $f=0$ . There are extensions of this theorem for abelian and some unimodular groups. In this paper, we prove that if $G$ has no (nonempty) open compact subsets, $\hat{f}$ , the regularised Fourier cotransform of  $f$ , is compactly supported and
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001119
      Issue No: Vol. 99, No. 1 (2019)
       
  • A CHARACTERISATION OF EUCLIDEAN NORMED PLANES VIA BISECTORS
    • Authors: JAVIER CABELLO SÁNCHEZ; ADRIÁN GORDILLO-MERINO
      Pages: 121 - 129
      Abstract: Our main result states that whenever we have a non-Euclidean norm $\Vert \cdot \Vert$ on a two-dimensional vector space $X$ , there exists some $x\neq 0$ such that for every $\unicode[STIX]{x1D706}\neq 1$ , $\unicode[STIX]{x1D706}>0$ , there exist $y,z\in X$ satisfying $\Vert y\Vert =\unicode[STIX]{x1D706}\Vert x\Vert$ , $z\neq 0$ and $z$ belongs to the bisectors $B(-x,x)$ and $B(-y,y)$ . We also give several results about the geometry of the unit sphere of strictly convex planes.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000758
      Issue No: Vol. 99, No. 1 (2019)
       
  • THE ROSENTHAL–SZASZ INEQUALITY FOR NORMED PLANES
    • Authors: VITOR BALESTRO; HORST MARTINI
      Pages: 130 - 136
      Abstract: We study the classical Rosenthal–Szasz inequality for a plane whose geometry is determined by a norm. This inequality states that the bodies of constant width have the largest perimeter among all planar convex bodies of given diameter. In the case where the unit circle of the norm is given by a Radon curve, we obtain an inequality which is completely analogous to the Euclidean case. For arbitrary norms we obtain an upper bound for the perimeter calculated in the anti-norm, yielding an analogous characterisation of all curves of constant width. To derive these results, we use methods from the differential geometry of curves in normed planes.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000813
      Issue No: Vol. 99, No. 1 (2019)
       
  • ENTIRE SOLUTIONS OF A CURVATURE FLOW IN AN UNDULATING CYLINDER
    • Authors: LIXIA YUAN; BENDONG LOU
      Pages: 137 - 147
      Abstract: We consider a curvature flow $V=\unicode[STIX]{x1D705}+A$ in a two-dimensional undulating cylinder $\unicode[STIX]{x1D6FA}$ described by $\unicode[STIX]{x1D6FA}:=\{(x,y)\in \mathbb{R}^{2}\mid -g_{1}(y)
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000795
      Issue No: Vol. 99, No. 1 (2019)
       
  • OPTIMAL STOPPING FOR THE LAST EXIT TIME
    • Authors: DAN REN
      Pages: 148 - 160
      Abstract: Given a one-dimensional downwards transient diffusion process $X$ , we consider a random time $\unicode[STIX]{x1D70C}$ , the last exit time when $X$ exits a certain level $\ell$ , and detect the optimal stopping time for it. In particular, for this random time $\unicode[STIX]{x1D70C}$ , we solve the optimisation problem $\inf _{\unicode[STIX]{x1D70F}}\mathbb{E}[\unicode[STIX]{x1D706}(\unicode[STIX]{x1D70F}-\unicode[STIX]{x1D70C})_{+}+(1-\unicode[STIX]{x1D706})(\unicode[STIX]{x1D70C}-\unicode[STIX]{x1D70F})_{+}]$ over all stopping times $\unicode[STIX]{x1D70F}$ . We show that the process should stop optimally when it runs below some fixed level $\unicode[STIX]{x1D705}_{\ell }$ for the first time, where $\unicode[STIX]{x1D705}_{\ell }$ is the unique solution in the interval $(0,\unicode[STIX]{x1D706}\ell )$ of an explicitly defined equation.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000990
      Issue No: Vol. 99, No. 1 (2019)
       
  • A SEPARATION PRINCIPLE FOR THE STABILISATION OF A CLASS OF FRACTIONAL
           ORDER TIME DELAY NONLINEAR SYSTEMS
    • Authors: NADHEM ECHI; IMED BASDOURI, HANEN BENALI
      Pages: 161 - 173
      Abstract: We establish a separation principle for a class of fractional order time-delay nonlinear differential systems. We show that a nonlinear time-delay observer is globally convergent and give sufficient conditions under which the observer-based controller stabilises the system.
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718000837
      Issue No: Vol. 99, No. 1 (2019)
       
  • DETECTION OF LONGITUDINAL BRAIN ATROPHY PATTERNS CONSISTENT WITH
           PROGRESSION TOWARDS ALZHEIMER’S DISEASE
    • Authors: MARCELA I. CESPEDES
      Pages: 174 - 176
      PubDate: 2019-02-01T00:00:00.000Z
      DOI: 10.1017/S0004972718001089
      Issue No: Vol. 99, No. 1 (2019)
       
 
 
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