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We give an elementary and self-contained proof of the uniformization theorem for non-compact simply-connected Riemann surfaces.

Complex Variables · Mathematics 2021-09-06 Cipriana Anghel , Rares Stan

It is generally accepted that Everett's theory of quantum mechanics cannot be experimentally tested as such experiment would involve operations on the observer which are beyond our current technology. We propose an alternative to test…

Quantum Physics · Physics 2021-10-06 Hitoshi Inamori

We use standard constructions in algebraic geometry and homological algebra to extend the decomposition and hard Lefschetz theorems of T. Mochizuki and C. Sabbah so that they remains valid without the quasi-projectivity assumptions.

Algebraic Geometry · Mathematics 2017-02-23 Mark Andrea de Cataldo

We prove a new version of Hall's Harem Theorem, where the final matching is realized by a unary function with additional conditions on behavior of cycles. The present paper can be considered as a helpful companion of the paper of the…

Combinatorics · Mathematics 2026-05-19 Karol Duda

We give a new proof of the main theorem in the theory of C(6) small cancellation complexes. We prove the fundamental theorem of cubical small cancellation theory for C(9) cubical small cancellation complexes.

Group Theory · Mathematics 2017-12-01 Kasia Jankiewicz

In this paper we extend the classical Korovkin theorems to the framework of comonotone additive, sublinear and monotone operators. Based on the theory of Choquet capacities, several concrete examples illustrating our results are also…

Classical Analysis and ODEs · Mathematics 2020-09-15 Sorin G. Gal , Constantin Niculescu

The aim of this article is to establish new two-functions minimax inequalities extending classical results such as Simons' minimax theorem. Our results will be proved in a non-compact setting. We also prove, under general conditions, that…

Functional Analysis · Mathematics 2024-11-18 Mohammed Bachir

We give a proof of the hard Lefschetz theorem for orbifolds that does not involve intersection homology. This answers a question of Fulton. We use a foliated version of the hard Lefschetz theorem due to El Kacimi.

Complex Variables · Mathematics 2009-04-09 Z. Z. Wang , D. Zaffran

I give a simpler proof of the generalisation of Engel's Theorem to Leibniz algebras.

Rings and Algebras · Mathematics 2011-07-12 Donald W. Barnes

This note is an exposition of the proof of Thom's conjecture by Kronheimer and Mrowka, using the new Seiberg-Witten invariants.

Differential Geometry · Mathematics 2007-05-23 Vishwambhar Pati

We show that a single special separation theorem (namely, a consequence of the geometric form of the Hahn-Banach theorem) can be used to prove Farkas type theorems, existence theorems for numerical quadrature with positive coefficients, and…

Functional Analysis · Mathematics 2018-01-01 Frank Deutsch , Hein Hundal , Ludmil Zikatanov

In this paper, using the concept of $A$-statistical convergence which is a regular (non-matrix) summability method, we obtain a general Korovkin type approximation theorem which concerns the problem of approximating a function $f$ by means…

Classical Analysis and ODEs · Mathematics 2007-05-23 Esra Erkus , Oktay Duman

We give a concise proof of the fundamental theorem of smoothing theory in the special case when a smoothing exists.

Algebraic Topology · Mathematics 2010-07-09 John R. Klein , Bruce Williams

We review the de Broglie-Bohm quantum theory. It is an alternative description of quantum phenomena in accordance with all the quantum experiments already performed. Essentially, it is a dynamical theory about objectively real trajectories…

General Relativity and Quantum Cosmology · Physics 2021-11-05 Nelson Pinto-Neto

We give a simple proof of the exponential de Finetti theorem due to Renner. Like Renner's proof, ours combines the post-selection de Finetti theorem, the Gentle Measurement lemma, and the Chernoff bound, but avoids virtually all…

Quantum Physics · Physics 2016-08-23 Thomas Vidick , Henry Yuen

We present a short proof of Jin's theorem which is entirely elementary, in the sense that no use is made of nonstandard analysis, ergodic theory, measure theory, ultrafilters, or other advanced tools. The given proof provides the explicit…

Combinatorics · Mathematics 2012-09-26 Mauro Di Nasso

Let $A$ be a finite-dimensional algebra over an algebraically closed field $\Bbbk$. For any finite-dimensional $A$-module $M$ we give a general formula that computes the indecomposable decomposition of $M$ without decomposing it, for which…

Representation Theory · Mathematics 2017-03-24 Hideto Asashiba , Ken Nakashima , Michio Yoshiwaki

A version of Bohm's model incorporating retrocausality is presented, the aim being to explain the nonlocality of Bell's theorem while maintaining Lorentz invariance in the underlying ontology. The strengths and weaknesses of this…

Quantum Physics · Physics 2020-02-05 Roderick Sutherland

In this work we present a simplifyed proof of Kantorovich's Theorem on Newton's Method. This analysis uses a technique which has already been used for obtaining new extensions of this theorem.

Numerical Analysis · Mathematics 2012-09-26 O. P. Ferreira , B. F. Svaiter

We present a very simple example of a theorem with constructive and non-constructive proofs: the equation c^2 x^2 - (c^2 + c)x + c = 0 has a solution.

History and Overview · Mathematics 2012-12-19 Jaime Gaspar