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We provide a partial solution to the problem of defining a constructive version of Voevodsky's simplicial model of univalent foundations. For this, we prove constructive counterparts of the necessary results of simplicial homotopy theory,…

Category Theory · Mathematics 2022-06-30 Nicola Gambino , Simon Henry

For a diagram of simplicial combinatorial model categories, we show that the associated lax limit, endowed with the projective model structure, is a presentation of the lax limit of the underlying $\infty$-categories. Our approach can also…

Algebraic Topology · Mathematics 2019-02-14 Yonatan Harpaz

Diagrammatic sets are presheaves on a rich category of shapes, whose definition is motivated by combinatorial topology and higher-dimensional diagram rewriting. These shapes include representatives of oriented simplices, cubes, and positive…

Algebraic Topology · Mathematics 2024-07-16 Clémence Chanavat , Amar Hadzihasanovic

We provide general conditions under which the algebras for a coloured operad in a monoidal model category carry a Quillen model structure, and prove a Comparison Theorem to the effect that a weak equivalence between suitable such operads…

Algebraic Topology · Mathematics 2008-01-17 Clemens Berger , Ieke Moerdijk

We show that any closed model category of simplicial algebras over an algebraic theory is Quillen equivalent to a proper closed model category. By ``simplicial algebra'' we mean any category of algebras over a simplicial algebraic theory,…

Algebraic Topology · Mathematics 2008-12-05 Charles Rezk

We introduce a combinatorial characterization of simpliciality for arrangements of hyperplanes. We then give a sharp upper bound for the number of hyperplanes of such an arrangement in the projective plane over a finite field, and present…

Combinatorics · Mathematics 2013-03-04 Michael Cuntz , David Geis

This paper investigates infinite matroids from a categorical perspective. We prove that the category of infinite matroids is a proto-exact category in the sense of Dyckerhoff and Kapranov, thereby generalizing our previous result on the…

Combinatorics · Mathematics 2021-09-01 Chris Eppolito , Jaiung Jun

By theorems of Carlson and Renaudin, the theory of $(\infty,1)$-categories embeds in that of prederivators. The purpose of this paper is to give a two-fold answer to the inverse problem: understanding which prederivators model…

Algebraic Topology · Mathematics 2018-10-16 Daniel Fuentes-Keuthan , Magdalena Kedziorek , Martina Rovelli

The goal of this article is to emphasize the role of cubical sets in enriched categories theory and infinity-categories theory. We show in particular that categories enriched in cubical sets provide a convenient way to describe many…

Category Theory · Mathematics 2021-04-21 Brice Le Grignou

We extend the bar-cobar adjunction to operads and properads, not necessarily augmented. Due to the default of augmentation, the objects of the dual category are endowed with a curvature. We handle the lack of augmentation by extending the…

K-Theory and Homology · Mathematics 2011-11-10 Joseph Hirsh , Joan Millès

In this paper we consider simplicial families, that is, simplicial objects indexed by a simplicial set. We develop a method to construct family hypercover refinements of a cover family based on the notion of \emph{n-spans} that we introduce…

Category Theory · Mathematics 2017-10-04 Eduardo J. Dubuc

We introduce and study structured enhancement of the notion of a crossed simplicial group, which we call an operadic crossed simplicial group. We show that with each operadic crossed simplicial group one can associate a certain operad in…

Algebraic Topology · Mathematics 2025-12-17 Artem Semidetnov

We show that all the possible pairs of integers occur as exponents for free or nearly free irreducible plane curves and line arrangements, by producing only two types of simple families of examples. The topology of the complements of these…

Algebraic Geometry · Mathematics 2017-08-30 Alexandru Dimca , Gabriel Sticlaru

We show that every braiding on a monoidal bicategory induces a monoidal structure on its bicategory of monoids, such that if the former is sylleptic or symmetric then the latter is braided or symmetric, respectively. This extends a classic…

Category Theory · Mathematics 2026-02-18 Raffael Stenzel

We produce combinatorial models for configuration space in a simplicial complex, and for configurations near a single point ("local configuration space.") The model for local configuration space is built out of the poset of poset structures…

Algebraic Topology · Mathematics 2019-04-16 John D. Wiltshire-Gordon

We introduce a new cubical model for homotopy types. More precisely, we'll define a category Qs with the following features: Qs is a PROP containing the classical box category as a subcategory, the category Qs-Set of presheaves of sets on…

Algebraic Topology · Mathematics 2009-10-27 Samuel B. Isaacson

We define vertex cover algebras for weighted simplicial multicomplexes and prove basics properties of them. Also, we describe these algebras for multicomplexes which have only one maximal facet and we prove that they are finitely generated.

Commutative Algebra · Mathematics 2016-03-29 Mircea Cimpoeas

This paper studies the homotopy theory of the Grothendieck construction using model categories and semi-model categories, provides a unifying framework for the homotopy theory of operads and their algebras and modules, and uses this…

Algebraic Topology · Mathematics 2026-05-20 Michael Batanin , Florian De Leger , David White

We extend the theory of Interacting Hopf algebras with an order primitive, and give a sound and complete axiomatisation of the prop of polyhedral cones. Next, we axiomatise an affine extension and prove soundness and completeness for the…

Logic in Computer Science · Computer Science 2024-01-17 Filippo Bonchi , Alessandro Di Giorgio , Pawel Sobocinski

With infinitely many high-quality data points, infinite computational power, an infinitely large foundation model with a perfect training algorithm and guaranteed zero generalization error on the pretext task, can the model be used for…

Artificial Intelligence · Computer Science 2026-04-27 Yang Yuan