Subjects -> STATISTICS (Total: 130 journals)
 Showing 1 - 151 of 151 Journals sorted alphabetically Advances in Complex Systems       (Followers: 10) Advances in Data Analysis and Classification       (Followers: 52) Applied Categorical Structures       (Followers: 5) Argumentation et analyse du discours       (Followers: 7) Asian Journal of Mathematics & Statistics       (Followers: 7) AStA Advances in Statistical Analysis       (Followers: 2) Australian & New Zealand Journal of Statistics       (Followers: 13) Biometrical Journal       (Followers: 9) Biometrics       (Followers: 54) British Journal of Mathematical and Statistical Psychology       (Followers: 18) Building Simulation       (Followers: 2) CHANCE       (Followers: 5) Communications in Statistics - Simulation and Computation       (Followers: 9) Communications in Statistics - Theory and Methods       (Followers: 11) Computational Statistics       (Followers: 15) Computational Statistics & Data Analysis       (Followers: 36) Current Research in Biostatistics       (Followers: 8) Decisions in Economics and Finance       (Followers: 15) Demographic Research       (Followers: 14) Engineering With Computers       (Followers: 5) Environmental and Ecological Statistics       (Followers: 7) ESAIM: Probability and Statistics       (Followers: 4) Extremes       (Followers: 2) Fuzzy Optimization and Decision Making       (Followers: 8) Geneva Papers on Risk and Insurance - Issues and Practice       (Followers: 13) Handbook of Numerical Analysis       (Followers: 4) Handbook of Statistics       (Followers: 7) IEA World Energy Statistics and Balances -       (Followers: 2) International Journal of Computational Economics and Econometrics       (Followers: 6) International Journal of Quality, Statistics, and Reliability       (Followers: 17) International Journal of Stochastic Analysis       (Followers: 2) International Statistical Review       (Followers: 12) Journal of Algebraic Combinatorics       (Followers: 3) Journal of Applied Statistics       (Followers: 20) Journal of Biopharmaceutical Statistics       (Followers: 24) Journal of Business & Economic Statistics       (Followers: 40, SJR: 3.664, CiteScore: 2) Journal of Combinatorial Optimization       (Followers: 7) Journal of Computational & Graphical Statistics       (Followers: 21) Journal of Econometrics       (Followers: 84) Journal of Educational and Behavioral Statistics       (Followers: 7) Journal of Forecasting       (Followers: 20) Journal of Global Optimization       (Followers: 7) Journal of Mathematics and Statistics       (Followers: 6) Journal of Nonparametric Statistics       (Followers: 6) Journal of Probability and Statistics       (Followers: 10) Journal of Risk and Uncertainty       (Followers: 33) Journal of Statistical and Econometric Methods       (Followers: 3) Journal of Statistical Physics       (Followers: 12) Journal of Statistical Planning and Inference       (Followers: 7) Journal of Statistical Software       (Followers: 17, SJR: 13.802, CiteScore: 16) Journal of the American Statistical Association       (Followers: 75, SJR: 3.746, CiteScore: 2) Journal of the Korean Statistical Society Journal of the Royal Statistical Society Series C (Applied Statistics)       (Followers: 38) Journal of the Royal Statistical Society, Series A (Statistics in Society)       (Followers: 28) Journal of the Royal Statistical Society, Series B (Statistical Methodology)       (Followers: 41) Journal of Theoretical Probability       (Followers: 3) Journal of Time Series Analysis       (Followers: 16) Journal of Urbanism: International Research on Placemaking and Urban Sustainability       (Followers: 27) Law, Probability and Risk       (Followers: 6) Lifetime Data Analysis       (Followers: 7) Mathematical Methods of Statistics       (Followers: 4) Measurement Interdisciplinary Research and Perspectives       (Followers: 1) Metrika       (Followers: 4) Monthly Statistics of International Trade - Statistiques mensuelles du commerce international       (Followers: 3) Multivariate Behavioral Research       (Followers: 8) Optimization Letters       (Followers: 2) Optimization Methods and Software       (Followers: 5) Oxford Bulletin of Economics and Statistics       (Followers: 34) Pharmaceutical Statistics       (Followers: 15) Queueing Systems       (Followers: 7) Research Synthesis Methods       (Followers: 7) Review of Economics and Statistics       (Followers: 171) Review of Socionetwork Strategies Risk Management       (Followers: 16) Sankhya A       (Followers: 3) Scandinavian Journal of Statistics       (Followers: 9) Sequential Analysis: Design Methods and Applications Significance       (Followers: 7) Sociological Methods & Research       (Followers: 45) SourceOECD Measuring Globalisation Statistics - SourceOCDE Mesurer la mondialisation - Base de donnees statistiques Stata Journal       (Followers: 8) Statistica Neerlandica       (Followers: 1) Statistical Inference for Stochastic Processes       (Followers: 3) Statistical Methods and Applications       (Followers: 6) Statistical Methods in Medical Research       (Followers: 30) Statistical Modelling       (Followers: 18) Statistical Papers       (Followers: 4) Statistics & Probability Letters       (Followers: 13) Statistics and Computing       (Followers: 14) Statistics and Economics Statistics in Medicine       (Followers: 151) Statistics: A Journal of Theoretical and Applied Statistics       (Followers: 12) Stochastic Models       (Followers: 2) Stochastics An International Journal of Probability and Stochastic Processes: formerly Stochastics and Stochastics Reports       (Followers: 2) Structural and Multidisciplinary Optimization       (Followers: 12) Teaching Statistics       (Followers: 8) Technology Innovations in Statistics Education (TISE)       (Followers: 2) TEST       (Followers: 2) The American Statistician       (Followers: 26) The Canadian Journal of Statistics / La Revue Canadienne de Statistique       (Followers: 10) Wiley Interdisciplinary Reviews - Computational Statistics       (Followers: 1)
Similar Journals
 Applied Categorical StructuresJournal Prestige (SJR): 0.49 Number of Followers: 5      Hybrid journal (It can contain Open Access articles) ISSN (Print) 1572-9095 - ISSN (Online) 0927-2852 Published by Springer-Verlag  [2467 journals]
• Closed and Open Maps for Partial Frames

Abstract: This paper concerns the notions of closed and open maps in the setting of partial frames, which, in contrast to full frames, do not necessarily have all joins. Examples of these include bounded distributive lattices, $$\sigma$$ - and $$\kappa$$ -frames and full frames. We define closed and open maps using geometrically intuitively appealing conditions involving preservation of closed, respectively open, congruences under certain maps. We then characterize them in terms of algebraic identities involving adjoints. We note that partial frame maps need have neither right nor left adjoints whereas frame maps of course always have right adjoints. The embedding of a partial frame in either its free frame or its congruence frame has proved illuminating and useful. We consider the conditions under which these embeddings are closed, open or skeletal. We then look at preservation and reflection of closed or open maps under the functors providing the free frame or the congruence frame. Points arise naturally in the construction of the spectrum functor for partial frames to partial spaces. They may be viewed as maps from the given partial frame to the 2-chain or as certain kinds of filters; using the former description we consider closed and open points. Any point of a partial frame extends naturally to a point on its free frame and a point on its congruence frame; we consider the closedness or openness of these.
PubDate: 2023-03-15

• Commutative Objects, Central Morphisms and Subtractors in Subtractive
Categories

Abstract: We give some characterizations of commutative objects in a subtractive category and central morphisms in a regular subtractive category. In particular, we show that commutative objects, i.e., internal unitary magmas, are the same as internal abelian groups in a subtractive category and that analogously, centrality has an alternative description in terms of so-called “subtractors” in a regular subtractive category.
PubDate: 2023-03-12

• Some Modifications of Hull Operators in Archimedean Lattice-Ordered Groups
with Weak Unit

Abstract: $${\textbf {W}}$$ denotes the category, or class of algebras, in the title. A hull operator (ho) in $${\textbf {W}}$$ is a function $$\textbf{ho} {\textbf {W}}\overset{h}{\longrightarrow }\ {\textbf {W}}$$ which can be called an essential closure operator. The family of these, denoted $$\textbf{ho} {\textbf {W}}$$ , is a proper class and a complete lattice in the ordering as functions “pointwise", with the bottom $${{\,\textrm{Id}\,}}_{{\textbf {W}}}$$ and top Conrad’s essential completion e. Other much studied hull operators are the divisible hull, maximum essential reflection, projectable hull, and Dedekind completion. This paper is the authors’ latest efforts to understand/create structure in $$\textbf{ho} {\textbf {W}}$$ through the nature of the interaction that an h might have with B, the bounded monocoreflection in $${\textbf {W}}$$ (e.g., Bh=hB). We define and investigate three functions $$\textbf{ho} {\textbf {W}}\longrightarrow \textbf{ho} {\textbf {W}}$$ which stand in the relation \begin{aligned} {{\,\textrm{Id}\,}}_{{\textbf {W}}} \le \overline{\alpha }(h) \le \overline{\lambda }(h) \le \overline{c}(h) \le h. \end{aligned} General properties that an h might have, and particular choices of h, show various assignments of < and $$=$$ in this chain.
PubDate: 2023-02-28

• Descent for internal multicategory functors

Abstract: We give sufficient conditions for effective descent in categories of (generalized) internal multicategories. Two approaches to study effective descent morphisms are pursued. The first one relies on establishing the category of internal multicategories as an equalizer of categories of diagrams. The second approach extends the techniques developed by Ivan Le Creurer in his study of descent for internal essentially algebraic structures.
PubDate: 2023-01-17

• Trace Decategorification of Categorified Quantum sl(3)

Abstract: We prove that the trace of categorified quantum $$\mathfrak {sl}_3$$ introduced by Khovanov and Lauda can also be identified with quantum $$\mathfrak {sl}_3$$ , thus providing an alternative way of decategorification. This is the second step of trace decategorification of quantum $$\mathfrak {sl}_n$$ groups over the integers, the first being the $$\mathfrak {sl}_2$$ case. The main technique used is decoupling of categorified quantum group into its positive and negative part. This technique can be used for more general categorified quantum groups to reduce the problem to the trace decategorification of its positive part. In the case of quantum $$\mathfrak {sl}_3$$ , there is an explicit form of the canonical basis of the positive (and isomorphically negative) part of it based on indecomposables found by Stošić, leading to the full result in this case.
PubDate: 2023-01-11

• A symmetric approach to higher coverings in categorical Galois theory

Abstract: In the context of a tower of (strongly Birkhoff) Galois structures in the sense of categorical Galois theory, we show that the concept of a higher covering admits a characterisation which is at the same time absolute (with respect to the base level in the tower), rather than inductively defined relative to extensions of a lower order; and symmetric, rather than depending on a perspective in terms of arrows pointing in a certain chosen direction. This result applies to the Galois theory of quandles, for instance, where it helps us characterising the higher coverings in purely algebraic terms.
PubDate: 2023-01-11

• Local Cohen–Macaulay DG-Modules

Abstract: Let A be a commutative noetherian local DG-ring with bounded cohomology. For local Cohen–Macaulay DG-modules with constant amplitude, we obtain an explicit formula for the sequential depth, show that Cohen–Macaulayness is stable under localization and give several equivalent definitions of maximal local Cohen–Macaulay DG-modules over local Cohen–Macaulay DG-rings. We also provide some characterizations of Gorenstein DG-rings by projective and injective dimensions of DG-modules.
PubDate: 2023-01-03
DOI: 10.1007/s10485-022-09703-y

• Minimal Models of Some Differential Graded Modules

Abstract: Minimal models of chain complexes associated with free torus actions on spaces have been extensively studied in the literature. In this paper, we discuss these constructions using the language of operads. The main goal of this paper is to define a new Koszul operad that has projections onto several of the operads used in these minimal model constructions.
PubDate: 2023-01-03
DOI: 10.1007/s10485-022-09708-7

• Ramsey Properties of Products and Pullbacks of Categories and the
Grothendieck Construction

Abstract: In this paper we provide purely categorical proofs of two important results of structural Ramsey theory: the result of M. Sokić that the free product of Ramsey classes is a Ramsey class, and the result of M. Bodirsky that adding constants to the language of a Ramsey class preserves the Ramsey property. The proofs that we present here ignore the model-theoretic background of these statements. Instead, they focus on categorical constructions by which the classes can be constructed generalizing the original statements along the way. It turns out that the restriction to classes of relational structures, although fundamental for the original proof strategies, is not relevant for the statements themselves. The categorical proofs we present here remove all restrictions on the signature of first-order structures and provide the information not only about the Ramsey property but also about the Ramsey degrees.
PubDate: 2022-12-29
DOI: 10.1007/s10485-022-09700-1

• A Pullback Diagram in the Coarse Category

Abstract: This paper studies the asymptotic product of two metric spaces. It is well defined if one of the spaces is visual or if both spaces are geodesic. In this case the asymptotic product is the pullback of a limit diagram in the coarse category. Using this product construction we can define a homotopy theory on coarse metric spaces in a natural way. We prove that all finite colimits exist in the coarse category.
PubDate: 2022-12-27
DOI: 10.1007/s10485-022-09707-8

• A Simplicial Category for Higher Correspondences

Abstract: In this work we propose a realization of Lurie’s prediction that inner fibrations $$p: X \rightarrow A$$ are classified by A-indexed diagrams in a “higher category” whose objects are $$\infty$$ -categories, morphisms are correspondences between them and higher morphisms are higher correspondences. We will obtain this as a corollary of a more general result which classifies all simplicial maps between ordinary simplicial sets in a similar fashion. Correspondences between simplicial sets (and $$\infty$$ -categories) are a generalization of the concept of profunctor (or bimodule) pertaining to categories. While categories, functors and profunctors are organized in a double category, we will exhibit simplicial sets, simplicial maps, and correspondences as part of a simplicial category. This allows us to make precise statements and provide proofs. Our main tool is the language of double categories, which we use in the context of simplicial categories as well.
PubDate: 2022-12-27
DOI: 10.1007/s10485-022-09705-w

• Unitless Frobenius Quantales

Abstract: It is often stated that Frobenius quantales are necessarily unital. By taking negation as a primitive operation, we can define Frobenius quantales that may not have a unit. We develop the elementary theory of these structures and show, in particular, how to define nuclei whose quotients are Frobenius quantales. This yields a phase semantics and a representation theorem via phase quantales. Important examples of these structures arise from Raney’s notion of tight Galois connection: tight endomaps of a complete lattice always form a Girard quantale which is unital if and only if the lattice is completely distributive. We give a characterisation and an enumeration of tight endomaps of the diamond lattices $$M_n$$ and exemplify the Frobenius structure on these maps. By means of phase semantics, we exhibit analogous examples built up from trace class operators on an infinite dimensional Hilbert space. Finally, we argue that units cannot be properly added to Frobenius quantales: every possible extention to a unital quantale fails to preserve negations.
PubDate: 2022-12-27
DOI: 10.1007/s10485-022-09699-5

• q-Tensor and Exterior Centers, Related Degrees and Capability

Abstract: We introduce intermediate commutators and study their degrees. We define $$(q, \{\})$$ -capable groups and prove that a group G is $$(q, \{\})$$ -capable if and only if $$Z^{\wedge }_{(q, \{\})}(G)=1$$ .
PubDate: 2022-12-26
DOI: 10.1007/s10485-022-09701-0

• Operators Between Classes of Modules Given by Preradicals

Abstract: Given a preradical we obtain operators between classes modules with closure properties. These operators turn out to be prenuclei and under suitable conditions nuclei. In particular, for the lattices of natural and conatural classes we obtain some nice properties and characterize some classes of rings.
PubDate: 2022-12-19
DOI: 10.1007/s10485-022-09702-z

• A Characterization of n-Gorenstein Tilting Comodules

Abstract: The aim of this paper is to introduce the concept of n-Gorenstein tilting comodules and study its main properties. This concept generalizes the notion of n-tilting comodules of finite injective dimensions to the case of finite Gorenstein injective dimensions. As an application of our results, we discuss the problem of existence of complements to partial n-Gorenstein tilting comodules.
PubDate: 2022-12-01
DOI: 10.1007/s10485-022-09688-8

• On the Cocartesian Image of Preorders and Equivalence Relations in Regular
Categories

Abstract: In a regular category $$\mathbb {E}$$ , the direct image along a regular epimorphism f of a preorder is not a preorder in general. In Set, its best preorder approximation is then its cocartesian image above f. In a regular category, the existence of such a cocartesian image above f of a preorder S is actually equivalent to the existence of the supremum $$R[f]\vee S$$ among the preorders. We investigate here some conditions ensuring the existence of these cocartesian images or equivalently of these suprema. They apply to two very dissimilar contexts: any topos $$\mathbb {E}$$ with suprema of countable chains of subobjects or any n-permutable regular category.
PubDate: 2022-12-01
DOI: 10.1007/s10485-022-09686-w

• Editorial

Abstract: Bernhard Banaschewski at work in his Study. Painted by Patricia Murphy (reprinted with permission)
PubDate: 2022-11-29
DOI: 10.1007/s10485-022-09697-7

• 2-Cartesian Fibrations I: A Model for $$\infty$$ -Bicategories Fibred in
$$\infty$$ -Bicategories

Abstract: In this paper, we provide a notion of $$\infty$$ -bicategories fibred in $$\infty$$ -bicategories which we call 2-Cartesian fibrations. Our definition is formulated using the language of marked biscaled simplicial sets: Those are scaled simplicial sets equipped with an additional collection of triangles containing the scaled 2-simplices, which we call lean triangles, in addition to a collection of edges containing all degenerate 1-simplices. We prove the existence of a left proper combinatorial simplicial model category whose fibrant objects are precisely the 2-Cartesian fibrations over a chosen scaled simplicial set S. Over the terminal scaled simplicial set, this provides a new model structure modeling $$\infty$$ -bicategories, which we show is Quillen equivalent to Lurie’s scaled simplicial set model. We conclude by providing a characterization of 2-Cartesian fibrations over an $$\infty$$ -bicategory. This characterization then allows us to identify those 2-Cartesian fibrations arising as the coherent nerve of a fibration of $${\text {Set}}^+_{\Delta }$$ -enriched categories, thus showing that our definition recovers the preexisting notions of fibred 2-categories.
PubDate: 2022-09-28
DOI: 10.1007/s10485-022-09693-x

• Matrix Taxonomy and Bourn Localization

Abstract: In a recent paper (Hoefnagel et al. in Theory Appl Categ 38:737–790, 2022), an algorithm has been presented for determining implications between a particular kind of category theoretic property represented by matrices—the so called ‘matrix properties’. In this paper we extend this algorithm to include matrix properties involving pointedness of a category, such as the properties of a category to be unital, strongly unital or subtractive, for example. Moreover, this extended algorithm can also be used to determine whether a given matrix property is the Bourn localization of another, thus leading to new characterizations of Mal’tsev, majority and arithmetical categories. Using a computer implementation of our algorithm, we can display all such properties given by matrices of fixed dimensions, grouped according to their Bourn localizations, as well as the implications between them.
PubDate: 2022-09-21
DOI: 10.1007/s10485-022-09692-y

• A Topological Duality for Monotone Expansions of Semilattices

Abstract: In this paper we provide a Stone style duality for monotone semilattices by using the topological duality developed in S. Celani, L.J. González (Appl Categ Struct 28:853–875, 2020) for semilattices together with a topological description of their canonical extension. As an application of this duality we obtain a characterization of the congruences of monotone semilattices by means of monotone lower-Vietoris-type topologies.
PubDate: 2022-08-29
DOI: 10.1007/s10485-022-09690-0

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