Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Ivanov, Milen"'
Autor:
Ivanov, Milen, Zlateva, Nadia
Properties of local and global slope of a function and its approximate critical points sets are studied in relation to determination of the function.
Externí odkaz:
http://arxiv.org/abs/2309.03505
We study Orlicz functions that do not satisfy the $\Delta_2$-condition at zero. We prove that for every Orlicz function $M$ such that $\limsup_{t\to0}M(t)/t^p >0$ for some $p\ge1$, there exists a positive sequence $T=(t_k)_{k=1}^\infty$ tending to ze
Externí odkaz:
http://arxiv.org/abs/2306.09654
Autor:
Ivanov, Milen, Sandstede, Bjorn
Contact defects are time-periodic patterns in one space dimension that resemble spatially homogeneous oscillations with an embedded defect in their core region. For theoretical and numerical purposes, it is important to understand whether these defec
Externí odkaz:
http://arxiv.org/abs/2301.04071
Autor:
Ivanov, Milen, Zlateva, Nadia
We present a proof of Hadamard Inverse Function Theorem by the methods of Variational Analysis, adapting an idea of I. Ekeland and E. Sere.
Externí odkaz:
http://arxiv.org/abs/2202.09327
Autor:
Bernroider, Edward, Ivanov, Milen
Motivated by scarce academic consideration of project management control frameworks, this article explores usage, value and structure of frameworks with a focus on the popular Control Objectives for IT and related Technology (CobiT) construct. We att
Autor:
Ivanov, Milen, Zlateva, Nadia
Publikováno v:
JOTA 190, 300-315, 2021
We consider the classical Inverse Function Theorem of Nash and Moser from the angle of some recent development by Ekeland and the authors. Geometrisation of tame estimates coupled with certain ideas coming from Variational Analysis when applied to a
Externí odkaz:
http://arxiv.org/abs/2005.12605
Autor:
Ivanov, Milen, Zlateva, Nadia
Publikováno v:
Journal of Convex Analysis 27 (2020), No. 4, 1091-1098
We present a new method for proving Correa-Jofr\'e-Thibault theorem that monotonicity of subdifferential implies convexity of the function. This new method is based on barrier functions. Barrier functions help overcome some of the main technical diff
Externí odkaz:
http://arxiv.org/abs/1904.00174
Autor:
Ivanov, Milen, Zlateva, Nadia
Publikováno v:
Journal of Convex Analysis 27 (2020), No. 1, 381-388
We provide a new proof along the lines of the recent book of A. Ioffe of a 1990's result of H. Frankowska showing that metric regularity of a multi-valued map can be characterized by regularity of its contingent variation - a notion extending conting
Externí odkaz:
http://arxiv.org/abs/1811.08243
Autor:
Ivanov, Milen, Zlateva, Nadia
We present simple and direct proof to an important case of Nash-Moser-Ekeland theorem.
Comment: In this third version we have made numerous improvements inspired by the referee, like correcting the definition of directional derivative to the sta
Comment: In this third version we have made numerous improvements inspired by the referee, like correcting the definition of directional derivative to the sta
Externí odkaz:
http://arxiv.org/abs/1809.00630
Autor:
Ivanov, Milen, Zlateva, Nadia
We prove surjectivity result in Fr\'echet spaces of Nash-Moser type. That is, with uniform estimates over all semimorms. Our method works for functions which are only continuous and G\^ateaux differentiable like in the recent result of Ekeland. We pr
Externí odkaz:
http://arxiv.org/abs/1805.07055