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We define a multiplication on the surreal numbers as higher inductive-inductive types.

Logic · Mathematics 2018-12-04 Jean S. Joseph

A \emph{morphism} is a mapping that transforms words through letter-wise substitution, where each symbol is consistently replaced by a fixed word. In the field of combinatorics on words, one topic that has attracted considerable attention…

Combinatorics · Mathematics 2026-05-19 Kaisei Kishi , Peaker Guo , Cristian Urbina , Hideo Bannai

We study infinite words fixed by a morphism and their derived words. A derived word is a coding of return words to a factor. We exhibit two examples of sets of morphisms which are closed under derivation --- any derived word with respect to…

Combinatorics · Mathematics 2019-11-28 Václav Košík , Štěpán Starosta

Given a countable set X (usually taken to be the natural numbers or integers), an infinite permutation, \pi, of X is a linear ordering of X. This paper investigates the combinatorial complexity of infinite permutations on the natural…

Discrete Mathematics · Computer Science 2011-08-19 Steven Widmer

We introduce a notion of a uniform structure on the set of all representations of a given separable, not necessarilly commutative $C^*$-algebra $\mathfrak{A}$ by introducing a suitable family of metrics on the set of representations of…

Operator Algebras · Mathematics 2018-05-17 Adam Wegert

In this paper, we consider the morphisms from projective spaces to flag varieties. We show that the morphisms can only be constant under some special conditions. As a consequence, we prove that the splitting types of unsplit uniform…

Algebraic Geometry · Mathematics 2025-01-08 Xinyi Fang , Peng Ren

We lift to the multivariate Eulerian polynomials the identity implying that univariate Eulerian polynomials are palindromic. As a consequence of this generalization, we obtain nice combinatorial identities that can be directly extracted…

Combinatorics · Mathematics 2026-01-23 Alejandro González Nevado

Isomorphism between formulae is defined with respect to categories formalizing equality of deductions in classical propositional logic and in the multiplicative fragment of classical linear propositional logic caught by proof nets. This…

Logic · Mathematics 2010-10-05 K. Dosen , Z. Petric

A unitary matrix model is proposed as the large-N matrix formulation of M theory on flat space with toroidal topology. The model reproduces the motion of elementary D-particles on the compact space, and admits membrane states with nonzero…

High Energy Physics - Theory · Physics 2010-11-19 Alexios P. Polychronakos

The purpose of this paper is to define some notions of movability for morphisms of inverse systems which extend the movability properties of inverse systems and which are compatible with the equivalence relations which define pro-morphisms…

Algebraic Topology · Mathematics 2016-06-09 P. S. Gevorgyan , I. Pop

We derive extensions of the monomialization theorems for morphisms of varieties in our earlier work. In this note we show that a local monomialization can be found which satisfies stronger local conditions. Some comments are made about how…

Algebraic Geometry · Mathematics 2016-12-05 Steven Dale Cutkosky

This paper provides a fresh perspective on the representation of distributive bilattices and of related varieties. The techniques of naturalduality are employed to give, economically and in a uniform way, categories ofstructures dually…

Rings and Algebras · Mathematics 2014-01-16 L. M. Cabrer , H. A. Priestley

In this paper, we define the notions $q$-birational morphism and $q$-birational divisor and develop the theory about them. We state and prove versions of Kodaira-type vanishing theorem and Zariski decomposition theorem for $q$-birational…

Algebraic Geometry · Mathematics 2022-12-07 Donghyeon Kim

We introduce two classes of morphisms over the alphabet $A=\{0,1\}$ whose fixed points contain infinitely many antipalindromic factors. An antipalindrome is a finite word invariant under the action of the antimorphism…

Combinatorics · Mathematics 2019-06-17 Petr Ambrož , Zuzana Masáková , Edita Pelantová

Soft set theory can deal uncertainties in nature by parametrization process. In this paper, we explore the objects and morphisms of category of soft sets, Sset(U) in detail. Also, gives characterizations of monomorphisms and epimorphisms in…

Category Theory · Mathematics 2019-02-05 Ratheesh K. P. , Sunil Jacob John

We classify the parabolic unitals in regular nearfield planes of odd order $q^2$ whose linear collineation group has the maximal size of $q^3-q$. We also establish a number of more general results concerning parabolic unitals in regular…

Combinatorics · Mathematics 2026-01-06 Randon J. Weaver , Robert S. Coulter , Alice M. W. Hui

In this paper, we prove that a class of regular sequences can be viewed as projections of fixed points of uniform morphisms on a countable alphabet, and also can be generated by countable states automata. Moreover, we prove that the…

Formal Languages and Automata Theory · Computer Science 2017-05-24 Jie-Meng Zhang , Jin Chen , Yingjun Guo , Zhixiong Wen

Theory of representations of universal algebra is a natural development of the theory of universal algebra. In the book, I considered representation of universal algebra, diagram of representations and examples of representation. Morphism…

General Mathematics · Mathematics 2022-05-01 Aleks Kleyn

We describe the role of algebraic extensions in the theory of commutative, unital normed algebras, with special attention to uniform algebras. We shall also compare these constructions and show how they are related to each other.

Functional Analysis · Mathematics 2007-05-23 Thomas William Dawson

This note documents the specification of normal forms in cubical type theory. The definition is already present in the proof of normalization for cubical type theory, but we present it in a more traditional style explicitly for reference.

Logic in Computer Science · Computer Science 2026-05-19 Xu Huang