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This paper presents a short and simple proof of the Four-Color Theorem that can be utterly checkable by human mathematicians, without computer assistance. The new key idea that has allowed it and the global structure of the proof are…

Discrete Mathematics · Computer Science 2019-11-05 André Luiz Barbosa

Our goal in the present paper is to give a new ergodic proof of a well-known Veech's result, build upon our previous works.

Dynamical Systems · Mathematics 2017-03-07 Panagiotis Georgopoulos

A simple proof of Egorov's theorem for infinite measure is given

Functional Analysis · Mathematics 2023-09-19 Semyon Litvinov

We present a simple proof of the fundamental theorem of Galois theory, which establishes a correspondence between the intermediate fields of a finite Galois extension and the subgroups of its Galois group. The proof is based on the…

Number Theory · Mathematics 2026-04-02 Martin Brandenburg

This paper contains a new elementary proof of the Fundamental Theorem of Calculus for the Lebesgue integral. The hardest part of our proof simply concerns the convergence in ${\rm L}^1$ of a certain sequence of step functions, and we prove…

Classical Analysis and ODEs · Mathematics 2012-03-08 Rodrigo López Pouso

In this paper the circulant Hadamard conjecture is proved.

Combinatorics · Mathematics 2019-09-06 Ronald Orozco López

The purpose of this short note is to present a simplified proof of Serre's modularity conjecture using the strong modularity lifting results currently available. This second version includes extra details on definitions and proofs than the…

Number Theory · Mathematics 2022-05-04 Luis Victor Dieulefait , Ariel Martín Pacetti

The paper contains an alternative proof of M. Kontsevich Formality Theorem.

Quantum Algebra · Mathematics 2007-05-23 Dmitry E. Tamarkin

A new description is given of all solutions to the relaxed commutant lifting problem. The method of proof is also different from earlier ones, and uses only an operator-valued version of a classical lemma on harmonic majorants.

Functional Analysis · Mathematics 2007-05-23 A. E. Frazho , S. ter Horst , M. A. Kaashoek

In [J. Combin. Theory Ser. B 70 (1997), 2-44] we gave a simplified proof of the Four-Color Theorem. The proof is computer-assisted in the sense that for two lemmas in the article we did not give proofs, and instead asserted that we have…

Combinatorics · Mathematics 2014-01-28 Neil Robertson , Daniel P. Sanders , Paul Seymour , Robin Thomas

I expound here in a more detailed way a proof of an important Serini's theorem, which I have already sketched in a previous Note. Two related questions are briefly discussed.

General Physics · Physics 2007-05-23 A. Loinger

We present a short new proof of Cobham's theorem without using Kronecker's approximation theorem, making it suitable for generalization beyond automatic sequences.

Formal Languages and Automata Theory · Computer Science 2018-01-23 Thijmen J. P. Krebs

The classical Technical Lemma for congruences is not difficult to prove but it is very efficient in its applications. We present here a Technical Lemma for congruences on \emph{finite lattices}. This is not difficult to prove either but it…

Rings and Algebras · Mathematics 2013-08-27 George Grätzer

In the current note, we present a new, short proof of the famous AM-GM-HM inequality using only induction and basic calculus.

General Mathematics · Mathematics 2022-06-06 Konstantinos Gaitanas

In this note we exhibit a very simple proof of McNaughton Theorem, almost right out of the definitions, and at the same time we observe that this theorem does not depend of Chang's completeness theorem.

Logic · Mathematics 2011-07-26 Eduardo J. Dubuc , Yuri Poveda

In this paper, we give a new and short proof of a Theorem on k-hypertournament losing scores due to Zhou et al.[7].

Combinatorics · Mathematics 2007-05-23 S. Pirzada , Zhou Guofei

Standard proofs of Lusin's theorem, using simple functions, are sometimes quite elaborate. Here, we give a one-sentence proof of Lusin's theorem. We do not believe our approach, by way of inverse images, is new. However, this particular…

Classical Analysis and ODEs · Mathematics 2018-11-01 Samuel J. Ferguson , Tianqi Wu

We show that the subgroup lattice of any finite group satisfies Frankl's Union-Closed Conjecture. We show the same for all lattices with a modular coatom, a family which includes all supersolvable and dually semimodular lattices. A common…

Combinatorics · Mathematics 2020-07-08 Alireza Abdollahi , Russ Woodroofe , Gjergji Zaimi

We prove a generalization of Istvan F\'ary's celebrated theorem to higher dimension.

Geometric Topology · Mathematics 2025-03-13 Karim Adiprasito , Zuzana Patáková

Mathematical proofs are often said to justify their conclusions by indicating the existence of a corresponding formal derivation. We argue that this widespread view relies on an under-examined notion of correspondence, or what it means for…

History and Overview · Mathematics 2026-03-20 Simon DeDeo , Eamon Duede
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