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The main objective of this work is to study mathematical properties of computational paths. Originally proposed by de Queiroz \& Gabbay (1994) as `sequences of rewrites', computational paths can be seen as the grounds on which the…

Logic in Computer Science · Computer Science 2015-09-23 Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina de Oliveira

One of the most interesting entities of homotopy type theory is the identity type. It gives rise to an interesting interpretation of the equality, since one can semantically interpret the equality between two terms of the same type as a…

Logic in Computer Science · Computer Science 2018-05-18 Tiago Mendonça Lucena de Veras , Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

Lumsdaine (2010) and van den Berg-Garner (2011) proved that types in Martin-L\"of type theory carry the structure of weak {\omega}-groupoids. Their proofs, while foundational, rely on abstract properties of the identity type without…

Logic in Computer Science · Computer Science 2025-12-02 Arthur F. Ramos , Tiago M. L. de Veras , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

The treatment of equality as a type in type theory gives rise to an interesting type-theoretic structure known as `identity type'. The idea is that, given terms $a,b$ of a type $A$, one may form the type $Id_{A}(a,b)$, whose elements are…

Logic in Computer Science · Computer Science 2018-04-27 Arthur Freitas Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

The treatment of equality as a type in type theory gives rise to an interesting type-theoretic structure known as `identity type'. The idea is that, given terms $a,b$ of a type $A$, one may form the type $Id_{A}(a,b)$, whose elements are…

Logic in Computer Science · Computer Science 2018-03-06 Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira , Tiago Mendonça Lucena de Veras

The main objective of this work is to study mathematical properties of computational paths. Originally proposed by de Queiroz \& Gabbay (1994) as `sequences or rewrites', computational paths are taken to be terms of the identity type of…

Logic in Computer Science · Computer Science 2016-09-09 Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

The Seifert-van Kampen theorem computes the fundamental group of a space from the fundamental groups of its constituents. We develop a modular SVK framework within the setting of computational paths - an approach to equality where witnesses…

Logic in Computer Science · Computer Science 2025-12-24 Arthur F. Ramos , Tiago M. L. de Veras , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

In proof theory the notion of canonical proof is rather basic, and it is usually taken for granted that a canonical proof of a sentence must be unique up to certain minor syntactical details (such as, e.g., change of bound variables). When…

Logic in Computer Science · Computer Science 2013-08-07 Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

We use a labelled deduction system based on the concept of computational paths (sequences of rewrites) as equalities between two terms of the same type. We also define a term rewriting system that is used to make computations between these…

Logic in Computer Science · Computer Science 2021-05-11 Tiago M. L. Veras , Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

In this work, we use a labelled deduction system based on the concept of computational paths (sequence of rewrites) as equalities between two terms of the same type. We also define a term rewriting system that is used to make computations…

Logic in Computer Science · Computer Science 2019-06-24 Tiago M. L. de Veras , Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

Directed topology is an area of mathematics with applications in concurrency. It extends the concept of a topological space by adding a notion of directedness, which restricts how paths can evolve through a space and enables thereby a…

Logic in Computer Science · Computer Science 2025-05-20 Henning Basold , Peter Bruin , Dominique Lawson

Brouwer's constructivist foundations of mathematics is based on an intuitively meaningful notion of computation shared by all mathematicians. Martin-L\"of's meaning explanations for constructive type theory define the concept of a type in…

Logic in Computer Science · Computer Science 2016-06-15 Carlo Angiuli , Robert Harper , Todd Wilson

AI-driven autoformalization of mathematics is advancing rapidly. However, the type checker of a proof assistant guarantees only the logical correctness of proofs; it does not verify whether propositions and definitions faithfully capture…

Human-Computer Interaction · Computer Science 2026-04-21 Banri Yanahama , Akiyoshi Sannai

This paper establishes the separation of complexity classes $\mathbf{P}$ and $\mathbf{NP}$ through a novel homological algebraic approach grounded in category theory. We construct the computational category $\mathbf{Comp}$, embedding…

Computational Complexity · Computer Science 2025-12-22 Jian-Gang Tang

The homotopical approach to intensional type theory views proofs of equality as paths. We explore what is required of an object $I$ in a topos to give such a path-based model of type theory in which paths are just functions with domain $I$.…

Logic in Computer Science · Computer Science 2023-06-22 Ian Orton , Andrew M. Pitts

This paper aims at carrying out termination proofs for simply typed higher-order calculi automatically by using ordering comparisons. To this end, we introduce the computability path ordering (CPO), a recursive relation on terms obtained by…

Logic in Computer Science · Computer Science 2019-03-14 Frédéric Blanqui , Jean-Pierre Jouannaud , Albert Rubio

We found in Homotopy Type Theory (HoTT), a way of representing a first order version of intuitionistic logic (ICL), for intuitionistic calculational logic) where, instead of deduction trees, corresponding linear calculational formats are…

Logic · Mathematics 2019-08-01 Ernesto Acosta , Bernarda Aldana , Jaime Bohorquez

Rough path theory is focused on capturing and making precise the interactions between highly oscillatory and non-linear systems. It draws on the analysis of LC Young and the geometric algebra of KT Chen. The concepts and the uniform…

Probability · Mathematics 2014-05-20 Terry Lyons

We present an extension to the $\mathtt{mathlib}$ library of the Lean theorem prover formalizing the foundations of computability theory. We use primitive recursive functions and partial recursive functions as the main objects of study, and…

Logic in Computer Science · Computer Science 2019-07-19 Mario Carneiro

Category theory provides a means through which many far-ranging fields of mathematics can be related by their similar structure. In a paper by Robinson [2], this interconnectivity afforded by categorical perspectives allowed for the…

Algebraic Topology · Mathematics 2020-12-03 Karthik Boyareddygari
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