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We introduce higher $F$-rationality generalising $F$-rationality. We prove that a normal variety over a field of characteristic zero is $m$-rational if and only if it is $m$-$F$-rational after reduction modulo a sufficiently large prime…

Algebraic Geometry · Mathematics 2026-04-15 Tatsuro Kawakami , Jakub Witaszek

In this paper we discuss the existence and regularity of solutions of fractional Lane-Emden systems with weights.

Analysis of PDEs · Mathematics 2017-09-18 Edir Leite

A survey of recent results in elementary number theory is presented in this paper. Special attention is given to structure and asymptotic properties of certain families of positive integers.

Number Theory · Mathematics 2007-05-23 Giuseppe Melfi

We construct an iterated function system consisting of strictly increasing contractions $f,g\colon [0,1]\to [0,1]$ with $f([0,1])\cap g([0,1])=\emptyset$ and such that its attractor has positive Lebesgue measure.

Classical Analysis and ODEs · Mathematics 2017-12-14 Janusz Morawiec , Thomas Zürcher

We introduce a new way of formalizing the intensional identity type based on the fact that a entity known as computational paths can be interpreted as terms of the identity type. Our approach enjoys the fact that our elimination rule is…

Logic in Computer Science · Computer Science 2015-04-21 Arthur F. Ramos , Ruy J. G. B. de Queiroz , Anjolina G. de Oliveira

We show that including degrees of a particular kind of provability in the search target for any theorem-prover in sufficiently powerful formal systems over finite-sized statements preserves well-definition and a sufficient consistency while…

Logic · Mathematics 2024-11-28 Rohan Bahl

A type analysable in one-based types in a simple theory is itself one-based.

Logic · Mathematics 2019-04-15 Frank Olaf Wagner

Sentences containing definite descriptions, expressions of the form `The $F$', can be formalised using a binary quantifier $\iota$ that forms a formula out of two predicates, where $\iota x[F, G]$ is read as `The $F$ is $G$'. This is an…

Logic in Computer Science · Computer Science 2021-08-12 Nils Kürbis

We consider real sequences $(f_n)$ that satisfy a linear recurrence with constant coefficients. We show that the density of the positivity set of such a sequence always exists. In the special case where the sequence has no positive…

Combinatorics · Mathematics 2007-05-23 Jason P. Bell , Stefan Gerhold

Native type systems are those in which type constructors are derived from term constructors, as well as the constructors of predicate logic and intuitionistic type theory. We present a method to construct native type systems for a broad…

Logic in Computer Science · Computer Science 2022-11-04 Christian Williams , Michael Stay

We present a unified theory for formal mathematical systems including recursive systems closely related to formal grammars, including the predicate calculus as well as a formal induction principle. We introduce recursive systems generating…

Logic · Mathematics 2021-12-21 Matthias Kunik

We define a logical framework with singleton types and one universe of small types. We give the semantics using a PER model; it is used for constructing a normalisation-by-evaluation algorithm. We prove completeness and soundness of the…

Logic in Computer Science · Computer Science 2015-07-01 Andreas Abel , Thierry Coquand , Miguel Pagano

We show that constructible models of arbitrary complete continuous first-order theories are unique up to isomorphism.

Logic · Mathematics 2025-01-07 James E. Hanson

We establish properties of a new type of fractal which has partial self similarity at all scales. For any collection of iterated functions systems with an associated probability distribution and any positive integer V there is a…

Dynamical Systems · Mathematics 2008-02-04 Michael Barnsley , John E. Hutchinson , Örjan Stenflo

We show how F-theory on a Calabi-Yau (n+1)-fold, in appropriate limit, can be identified as an orientifold of type IIB string theory compactified on a Calabi-Yau n-fold.

High Energy Physics - Theory · Physics 2009-09-15 Ashoke Sen

We present new criteria on the existence of fixed points that combine some monotonicity assumptions with the classical fixed point index theory. As an illustrative application, we use our theoretical results to prove the existence of…

Classical Analysis and ODEs · Mathematics 2014-12-12 Alberto Cabada , José Ángel Cid , Gennaro Infante

In the theory of unitary group representations, a group is called type I if all factor representations are of type I, and by a celebrated theorem of James Glimm [Gli61b], the type I groups are precisely those groups for which the…

Group Theory · Mathematics 2019-04-18 Fabio Elio Tonti , Asger Törnquist

In this paper, we construct certain infinite families of imaginary quadratic fields whose class number is divisible by a given positive integer.

Number Theory · Mathematics 2012-12-11 Akiko Ito

We discuss examples of systems which can be quantized consistently, although they do not admit a Lagrangian description.

High Energy Physics - Theory · Physics 2008-11-26 Ciprian Acatrinei

We find sufficient conditions which imply equality of the finitistic test ideal and test ideal in rings of prime characteristic. Utilizing recent progress from the prime characteristic minimal model program we equate the notions of…

Commutative Algebra · Mathematics 2021-03-16 Ian Aberbach , Thomas Polstra