Results 11 to 20 of about 81 (52)

A non-DC function which is DC along all convex curves [PDF]

open access: yes, 2018
A problem asked by the authors in 1989 concerns the natural question, whether one can deduce that a continuous function f on an open convex set D subset of R-n is DC (i.e., is a difference of two convex functions) from the behavior of f "along some ...
L. Vesely, L. Zajicek
core   +1 more source

Analytical modelling of perforated geometrical domains by the R-functions [PDF]

open access: yes, 2020
This paper deals with the construction of boundary equations for geometric domains with perforation. Different types of perforated geometric domains are considered. The R-functions method for analytical modelling of perforated geometrical domains is used.
Yuriy Semerich
core   +3 more sources

ITERATED -FRACTIONAL VECTOR REPRESENTATION FORMULAE AND INEQUALITIES FOR BANACH SPACE VALUED FUNCTIONS [PDF]

open access: yes, 2020
Here we present very general iterated fractional Bochner integral representation formulae for Banach space valued functions. Based on these we derive generalized and iterated left and right: fractional Poincar´e type inequalities, fractional Opial type ...
George A. Anastassiou
core   +2 more sources

Comparison meaningful operators and ordinal invariant preferences [PDF]

open access: yes, 2015
The existence of a continuous and order-preserving real-valued function, for the class of continuous and ordinal invariant total preorders, defined on the Banach space of all bounded real-valued functions, which are in turn defined on a given set Ω, is ...
Candeal, Juan Carlos   +1 more
core   +1 more source

Spaces with a Finite Family of Basic Functions

open access: yes, 2008
A space X is finite dimensional, locally compact and separable metrizable if and only if X has a finite basic family: continuous functions Phi_1,...,Phi_n of X to the reals, R, such that for all continuous f from X to R there are g_1,..., g_n in C(R ...
Gartside, Paul, Ziqin, Feng
core   +1 more source

A contour view on uninorm properties [PDF]

open access: yes, 1999
summary:Any given increasing $[0,1]^2\rightarrow [0,1]$ function is completely determined by its contour lines. In this paper we show how each individual uninorm property can be translated into a property of contour lines.
Su, Yong, Tang, Keming, Wang, Zhudeng
core   +2 more sources

Sard theorems for Lipschitz functions and applications in optimization [PDF]

open access: yes, 2016
International audienceWe establish a " preparatory Sard theorem " for smooth functions with a partial affine structure. By means of this result, we improve a previous result of Rifford [14, 16] concerning the generalized (Clarke) critical values of ...
Barbet, Luc   +3 more
core   +5 more sources

Multi-variable translation equation which arises from homothety

open access: yes, 2010
In many regular cases, there exists a (properly defined) limit of iterations of a function in several real variables, and this limit satisfies the functional equation (1-z)f(x)=f(f(xz)(1-z)/z); here z is a scalar and x is a vector. This is a special case
A. Mach   +8 more
core   +1 more source

De Rham compatible Deep Neural Network FEM

open access: yes, 2022
On general regular simplicial partitions $\mathcal{T}$ of bounded polytopal domains $\Omega \subset \mathbb{R}^d$, $d\in\{2,3\}$, we construct \emph{exact neural network (NN) emulations} of all lowest order finite element spaces in the discrete de Rham ...
Disch, Nico   +4 more
core   +1 more source

On strong algebrability of families of non-measurable functions of two variables

open access: yes, 2023
Recently Tomasz Natkaniec in [On lineability of families of non-measurable functions of two variable. Rev. R. Acad. Cienc. Exactas F\'is. Nat. Ser. A Mat. RACSAM, 115(1):Paper No.
Głcab, Szymon   +2 more
core  

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