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This paper studies the infinitesimal structure of Carnot manifolds. By a Carnot manifold we mean a manifold together with a subbundle filtration of its tangent bundle which is compatible with the Lie bracket of vector fields. We introduce a…

Differential Geometry · Mathematics 2019-02-12 Woocheol Choi , Raphael Ponge

In what has become a standard eternal inflation picture of the string landscape there are many problematic consequences and a difficulty defining probabilities for the occurrence of each type of universe. One feature in particular that…

Cosmology and Nongalactic Astrophysics · Physics 2013-12-09 L. Clavelli , Gary R. Goldstein

In the present paper, we propose a new axiomatic approach to nonstandard analysis and its application to the general theory of spatial structures in terms of category theory. Our framework is based on the idea of internal set theory, while…

Category Theory · Mathematics 2021-08-27 Hayato Saigo , Juzo Nohmi

We survay some nice result concerning the irrationals with a metric space point of view.Here is ofcourse nothing new may be or an expert in this field.

History and Overview · Mathematics 2007-05-23 Pratip Chakraborty

We present a new kind of nontermination argument, called geometric nontermination argument. The geometric nontermination argument is a finite representation of an infinite execution that has the form of a sum of several geometric series.…

Logic in Computer Science · Computer Science 2016-09-20 Jan Leike , Matthias Heizmann

In the present paper we deal with (local) infinitesimal isometries of special sub-Riemannian manifolds (a contact and oriented sub-Riemannian manifold is called special if the Reeb vector field is an isometry). The objective of the paper is…

Differential Geometry · Mathematics 2024-10-02 Marek Grochowski

We prove that there is a residual subset of the Gromov-Hausdorff space (i.e. the space of all compact metric spaces up to isometry endowed with the Gromov-Hausdorff distance) whose points enjoy several unexpected properties. In particular,…

Metric Geometry · Mathematics 2010-03-29 Joël Rouyer

Can there be a structure space-type theory for an arbitrary class of ideals of a ring? The ideal spaces introduced in this paper allows such a study and our theory includes (but not restricted to) prime, maximal, minimal prime, strongly…

Commutative Algebra · Mathematics 2024-08-21 Themba Dube , Amartya Goswami

Geodesic incompleteness is a problem in both general relativity and string theory. The Weyl invariant Standard Model coupled to General Relativity (SM+GR), and a similar treatment of string theory, are improved theories that are…

High Energy Physics - Theory · Physics 2016-02-17 Itzhak Bars , Albin James

We show that the field of complex numbers $\mathbb C$ contains non-zero infinitesimals by observing that $\mathbb C$ contains non-Archimedean subfields. Our observation is based on an old theorem in algebra due to E. Steinitz, discussed in…

History and Overview · Mathematics 2026-03-25 Todor D. Todorov

We show how to decompose all separable ultrametric spaces into a "Lego" combinations of scaled versions of full simplices. To do this we introduce metric resolutions of large scale metric spaces, which describe how a space can be broken up…

Metric Geometry · Mathematics 2022-05-13 Yuankui Ma , Jeremy Siegert , Jerzy Dydak

This commentary considers non-standard analysis and a recently introduced computational methodology based on the notion of \G1 (this symbol is called \emph{grossone}). The latter approach was developed with the intention to allow one to…

General Mathematics · Mathematics 2018-07-25 Yaroslav D. Sergeyev

The mathematical notion of incompleteness (eg of rational numbers, Turing-computable functions, and arithmetic proof) does not play a key role in conventional physics. Here, a reformulation of the kinematics of quantum theory is attempted,…

Quantum Physics · Physics 2007-05-23 T. N. Palmer

In Itamar Pitowsky's reading of the Gleason and the Kochen-Specker theorems, in particular, his Logical Indeterminacy Principle, the emphasis is on the value indefiniteness of observables which are not within the preparation context. This…

Quantum Physics · Physics 2020-04-15 Karl Svozil

This paper provides a quantitative version of the recent result of Kn\"upfer and Muratov ({\it Commun. Pure Appl. Math.} {\bf 66} (2013), 1129--1162) concerning the solutions of an extension of the classical isoperimetric problem in which a…

Optimization and Control · Mathematics 2015-07-01 Cyrill B. Muratov , Anthony Zaleski

In this note several computations of equivariant cohomology groups are performed. For the compactly supported equivariant cohomology, the notion of infinitesimal index developed in arXiv:1003.3525, allows to describe these groups in terms…

Differential Geometry · Mathematics 2015-03-17 Corrado De Concini , Claudio Procesi , Michele Vergne

This paper deals with the subject of infinitesimal variations of Euclidean submanifolds with arbitrary dimension and codimension. The main goal is to establish a Fundamental theorem for these geometric objects. Similar to the theory of…

Differential Geometry · Mathematics 2020-07-15 M. Dajczer , M. I. Jimenez

Quantum field theory has successfully generated a number of general conclusions. It seems meaningful to disclose the logical forms of these conclusions. The present paper reports two results. The first result shows the logic of local gauge…

Logic · Mathematics 2020-04-29 Yingrui Yang

Infinite Time Register Machines ($ITRM$'s) are a well-established machine model for infinitary computations. Their computational strength relative to oracles is understood, see e.g. Koepke (2009), Koepke and Welch (2011) and Koepke and…

Logic · Mathematics 2026-05-19 Merlin Carl

The notion of an orthogonality space was recently rediscovered as an effective means to characterise the essential properties of quantum logic. The approach can be considered as minimalistic; solely the aspect of mutual exclusiveness is…

Logic · Mathematics 2021-03-26 Kadir Emir , David Kruml , Jan Paseka , Thomas Vetterlein