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We present an operator algebraic approach to Wigner's unitary-antiunitary theorem using some classical results from ring theory. To show how effective this approach is, we prove a generalization of this celebrated theorem for Hilbert…

Operator Algebras · Mathematics 2007-05-23 Lajos Molnar

In this paper we derive some basic results of circuit theory using `Implicit Linear Algebra' (ILA). This approach has the advantage of simplicity and generality. Implicit linear algebra is outlined in [1]. We denote the space of all vectors…

Systems and Control · Electrical Eng. & Systems 2020-05-05 H. Narayanan , Hariharan Narayanan

We present our library for Universal Algebra in the UniMath framework dealing with multi-sorted signatures, their algebras, and the basics for equation systems. We show how to implement term algebras over a signature without resorting to…

Logic in Computer Science · Computer Science 2025-02-12 Gianluca Amato , Matteo Calosci , Marco Maggesi , Cosimo Perini Brogi

We give a proof of Fermat's little theorem which does not use nor arithmetic(Euclidean algorithm) neither algebra (group theory), but it rather employs the field of the formal power series Q((x)). The note is an example of a mathematical…

Number Theory · Mathematics 2009-11-03 Giedrius Alkauskas

We provide a proof of Wilson's Theorem and Wolstenholme's Theorem based on a direct approach by Lagrange requiring only basic properties of the primes and the Binomial theorem. The goal is to show how similar the two theorems are by…

History and Overview · Mathematics 2019-07-18 Saud Hussein

The arithmetic fundamental lemma conjecture of the third author connects the derivative of an orbital integral on a symmetric space with an intersection number on a formal moduli space of $p$-divisible groups of Picard type. It arises in…

Number Theory · Mathematics 2014-02-18 Michael Rapoport , Ulrich Terstiege , Wei Zhang

Tomita-Takesaki theory associates a positive operator called the "modular operator" with a von Neumann algebra and a cyclic-separating vector. Tomita's theorem says that the unitary flow generated by the modular operator leaves the algebra…

Operator Algebras · Mathematics 2024-10-24 Jonathan Sorce

For a monic polynomial p(z) with coefficients in a unital complex Banach algebra, we prove that there exist a complex number z such that p(z)is not invertible

Functional Analysis · Mathematics 2011-04-22 Ali Taghavi

In this note, we use the concept of a polynomial ring to give an elementary proof to Cayley-Hamilton Theorem. We also give an elementary proof to Birkhoff theorem on Bi-stochastic matrices.

History and Overview · Mathematics 2019-12-10 Yifan Ren , Tongsuo Wu

The Collatz hypothesis is a theorem of the algorithmic theory of natural numbers. We prove the (algorithmic) formula that expresses the halting property of Collatz algorithm. The observation that Collatz's theorem cannot be proved in any…

General Mathematics · Mathematics 2026-03-03 Grażyna Mirkowska , Andrzej Salwicki

Ritt's theorem of zeroes and Seidenberg's embedding theorem are classical results in differential algebra allowing to connect algebraic and model-theoretic results on nonlinear PDEs to the realm of analysis. However, the existing proofs of…

Commutative Algebra · Mathematics 2021-07-08 Dmitrii Pavlov , Gleb Pogudin , Yury Razmyslov

We define noncommutative binary forms. Using the typical representation of Hermite we prove the fundamental theorem of algebra and we derive a noncommutative Cardano formula for cubic forms. We define quantized elliptic and hyperelliptic…

Quantum Algebra · Mathematics 2015-06-26 Frank Leitenberger

It is known that the famous Heins Theorem (also known as the de Branges Lemma) about the minimum of two entire functions of minimal type does not extend to functions of finite exponential type. We study in detail pairs of entire functions…

Complex Variables · Mathematics 2020-02-11 Aleksei Kulikov

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

The Fundamental Theorem of Algebra (FTA) asserts that every complex polynomial has as many complex roots, counted with multiplicities, as its degree. A probabilistic analogue of this theorem for real roots of real polynomials, commonly…

Algebraic Geometry · Mathematics 2025-11-25 Boris Kazarnovskii

We review definitions and basic properties of operads, PROPs and algebras over these structures.

Algebraic Topology · Mathematics 2007-05-23 Martin Markl

Using Effros-Handelman-Shen theorem and Elliott's classification theorem of AF algebras, we show that there exists a unital simple AF algebra A with unique trace such that $A\otimes \mathbb{K}$ admits no trace scaling action of the…

Operator Algebras · Mathematics 2011-09-09 Norio Nawata

We prove that n independent abelian functions admit an algebraic addition theorem, with no appeal to theta functions.

Complex Variables · Mathematics 2007-05-23 Mark B. Villarino

In this note we give an elementary demonstration of the fact that AB=I implies BA=I for square matrices A,B with coefficients in a field K. By elementary we mean that our proof follows from the very definitions of matrix and product of a…

Rings and Algebras · Mathematics 2016-09-01 J. M. Almira

This note surveys how the exterior algebra and deformations or quotients of it, gives rise to centrally important notions in five domains of mathematics: Combinatorics, Topology, Lie theory, Mathematical physics, and Algebraic geometry.

History and Overview · Mathematics 2015-04-28 Gunnar Fløystad