Results 31 to 40 of about 5,138 (192)

'A difficult case' : Pacioli and Cardano on the Chinese Rings [PDF]

open access: yes, 2017
The Chinese rings puzzle is one of those recreational mathematical problems known for several centuries in the West as well as in Asia. Its origin is diffcult to ascertain but is most likely not Chinese.
Heeffer, Albrecht, Hinz, Andreas M.
core   +2 more sources

The Golden Ratio of Gait Harmony: Repetitive Proportions of Repetitive Gait Phases

open access: yesBioMed Research International, Volume 2013, Issue 1, 2013., 2013
In nature, many physical and biological systems have structures showing harmonic properties. Some of them were found related to the irrational number ϕ known as the golden ratio that has important symmetric and harmonic properties. In this study, the spatiotemporal gait parameters of 25 healthy subjects were analyzed using a stereophotogrammetric ...
Marco Iosa   +7 more
wiley   +1 more source

SOBRE A DIVULGAÇÃO DO SISTEMA INDO-ARÁBICO NA EUROPA NO SÉCULO XIII

open access: yesBoletim Cearense de Educação e História da Matemática, 2020
Nesta comunicação apresentamos alguns pontos que nos permite de forma preliminar investigar sobre a divulgação dos algarismos indo-arábicos na Europa no século XIII, afinal, estes se constituem ao longo da história humana como um sistema universal. Com a
José dos Santos Guimarães Filho   +1 more
doaj   +1 more source

An Introduction to Finite Fibonomial Calculus

open access: yes, 2004
This is an indicatory presentation of main definitions and theorems of fibonomial calculus which is a special case of psi-extented rota's finite operator calculus.Comment: 16 ...
Krot, Ewa
core   +1 more source

Predictor‐Corrector Primal‐Dual Interior Point Method for Solving Economic Dispatch Problems: A Postoptimization Analysis

open access: yesMathematical Problems in Engineering, Volume 2012, Issue 1, 2012., 2012
This paper proposes a predictor‐corrector primal‐dual interior point method which introduces line search procedures (IPLS) in both the predictor and corrector steps. The Fibonacci search technique is used in the predictor step, while an Armijo line search is used in the corrector step.
Antonio Roberto Balbo   +4 more
wiley   +1 more source

Some Properties of the Generalized Leonardo Numbers

open access: yesJournal of New Theory
In this study, various properties of the generalized Leonardo numbers, which are one of the generalizations of Leonardo numbers, have been investigated. Additionally, some identities among the generalized Leonardo numbers have been obtained. Furthermore,
Yasemin Alp
doaj   +1 more source

On the Hyperbolic Leonardo and Hyperbolic Francois Quaternions

open access: yesJournal of New Theory, 2023
In this paper, we present a new definition, referred to as the Francois sequence, related to the Lucas-like form of the Leonardo sequence. We also introduce the hyperbolic Leonardo and hyperbolic Francois quaternions.
Paula Maria Machado Cruz Catarino   +2 more
doaj   +1 more source

On the Adjacent Cycle Derangements

open access: yesInternational Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
A derangement, that is, a permutation without fixed points, of a finite set is said to be an adjacent cycle when all its cycles are formed by a consecutive set of integers. In this paper we determine enumerative properties of these permutations using analytical and bijective proofs.
Luisa de Francesco Albasini   +4 more
wiley   +1 more source

Fibonacci’s Computation Methods vs Modern Algorithms

open access: yesReti Medievali Rivista, 2013
In this paper we discuss some computational procedures given by Leonardo Pisano Fibonacci in his famous Liber Abaci book, and we propose their translation into a modern language for computers (C ++).
Ernesto Burattini
doaj   +1 more source

Indian cosmogonies and cosmologies [PDF]

open access: yesFilozofija i Društvo, 2011
Various ideas on how the universe appeared and develops, were in Indian tradition related to mythic, religious, or philosophical ideas and contexts, and developed during some 3.000 years - from the time of Vedas, to Puranas. Conserning its appeareance,
Pajin Dušan
doaj   +1 more source

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