Results 31 to 40 of about 84 (45)

Wilker and Huygens type inequalities for mixed trigonometric-hyperbolic functions

open access: yes, 2020
Motivated by the work of J. S\'andor [19], in this paper we establish a new Wilker type and Huygens type inequalities involving the trigonometric and hyperbolic functions. Moreover, in terms of hyperbolic functions, the upper and lower bounds of sin(x)/x
Bagul, Yogesh J.   +3 more
core  

More on one class of fractals

open access: yes, 2017
This article is devoted to Cantor-like sets. We describe topological, metric and fractal properties of certain sets whose elements have restrictions on using digits or combinations of digits in own representations.
Serbenyuk, Symon
core  

An Integral Equation for Riemann's Zeta Function and its Approximate Solution

open access: yes, 2019
Two identities extracted from the literature are coupled to obtain an integral equation for Riemann's $\xi(s)$ function, and thus $\zeta(s)$ indirectly.
Milgram, Michael
core   +1 more source

Integración en términos de funciones elementales [PDF]

open access: yes, 2014
El objetivo de este trabajo es demostrar que hay funciones elementales que no admiten primitiva elemental. Para ello, en la primera parte presentamos una introducción al álgebra diferencial, en la que definimos qué son los cuerpos y los anillos ...
Mañá Ricón, Samuel
core  

A Series Representation for Riemann's Zeta Function and some Interesting Identities that Follow

open access: yes, 2020
Using Cauchy's Integral Theorem as a basis, what may be a new series representation for Dirichlet's function $\eta(s)$, and hence Riemann's function $\zeta(s)$, is obtained in terms of the Exponential Integral function $E_{s}(i\kappa)$ of complex ...
Milgram, Michael
core  

μοντέλα διάχυσης για την ενσύρματη και ασύρματη ευρυζωνική πρόσβαση στο διαδίκτυο σε χώρες του ο.ο.σ.α. [PDF]

open access: yes, 2015
Στην παρούσα πτυχιακή εργασία εξετάζεται και παρουσιάζεται ο ρυθμός διείσδυσης (penetration rate) των ευρυζωνικών υπηρεσιών (broadband services), τόσο της ενσύρματης (wired) όσο και της ασύρματης (wireless), στις χώρες μέλη του ΟΟΣΑ.
Μαλτεζάκης-Βαθυπέτρου Δημήτριος
core  

A Schur's type volume comparison theorem

open access: yes
In this paper, inspired by Schur's comparison theorem about curves in Euclidean space, we mainly provide a Schur's type volume comparison theorem, which is about the volumes of the boundaries of open balls in a complete $n$-dimensional Riemannian ...
Su, Xiaole, Tan, Yi, Wang, Yusheng
core  

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