Displaying similar documents to “Triples of Positive Integers with the same Sum and the same Product”

Editorial - Serdica Journal of Computing 2015

Stanchev, Peter (2015)

Serdica Journal of Computing

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This special double issue of Serdica Journal of Computing is dedicated to the 80 th anniversary of the birthday of Professor Edward A. Friedman, internationally renowned scientist and innovative educator, versatile humanitarian, and member of our editorial board.

Serdica Journal of Computing : The First Ten Years

Derzhanski, Ivan, Siruk, Olena (2017)

Serdica Journal of Computing

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Serdica Journal of Computing has completed its first decade. On this occasion we offer some notes, statistical and otherwise, on the first ten volumes of the journal, concerning the number of authors and papers, the geographical and institutional distribution of authors’ affiliations, the structural semantic makeup, the dynamics of the editorial board, and various important developments in this period. ACM Computing Classification System (1998): A.0.

Conference on Geometry and Mathematical Physics, Bulgaria, Zlatograd, 28.08-01.09.2005

Tsanov, V. (1997)

Serdica Mathematical Journal

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List of Participants Organizing committee: Vasil Tsanov – Sofia University (Chairman), Harry Aleksiev – High School for Management and Laguages in Zlatograd (Local Organizer), Leon Farhy – Sofia University (Scientific Secretary), Emil Horozov – Sofia University, Ivailo Mladenov – Bulgarian Academy of Sciences, Angel Zhivkov – Sofia University.

Continuous Dependence of Solutions of Quasidifferential Equations with Non-Fixed Time of Impulses

Plotnikov, V., Kitanov, P. (1998)

Serdica Mathematical Journal

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In this article on quasidifferential equation with non-fixed time of impulses we consider the continuous dependence of the solutions on the initial conditions as well as the mappings defined by these equations. We prove general theorems for quasidifferential equations from which follows corresponding results for differential equations, differential inclusion and equations with Hukuhara derivative.

A Remark On S.M. Bates' Theorem

Hájek, Petr (1999)

Serdica Mathematical Journal

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In his paper [1], Bates investigates the existence of nonlinear, but highly smooth, surjective operators between various classes of Banach spaces. Modifying his basic method, he obtains the following striking results.

Niven’s Theorem

Artur Korniłowicz, Adam Naumowicz (2016)

Formalized Mathematics

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This article formalizes the proof of Niven’s theorem [12] which states that if x/π and sin(x) are both rational, then the sine takes values 0, ±1/2, and ±1. The main part of the formalization follows the informal proof presented at Pr∞fWiki (https://proofwiki.org/wiki/Niven’s_Theorem#Source_of_Name). For this proof, we have also formalized the rational and integral root theorems setting constraints on solutions of polynomial equations with integer coefficients [8, 9].