Results 11 to 20 of about 221,630 (309)

Prezentizmus a prítomný moment (Presentism and the present moment )

open access: yesOstium, 2017
The paper examines the relation between presentism and the experience of the present moment. Some presentists believe that our experience of the present moment is in correspondence with the presentistic theory of the present moment. This link between our
Juraj Odorčák
doaj   +1 more source

Analysis of non scalar control problems for parabolic systems by the block moment method

open access: yesComptes Rendus. Mathématique, 2023
This article deals with abstract linear time invariant controlled systems of parabolic type. In [9], with A. Benabdallah, we introduced the block moment method for scalar control operators.
Boyer, Franck, Morancey, Morgan
doaj   +1 more source

Shape, Velocity, and Exact Controllability for the Wave Equation

open access: yesJournal of Optimization, Differential Equations and Their Applications, 2022
A new method to prove exact controllability for the wave equation is demonstrated and discussed on several examples. The method of proof first uses a dynamical argument to prove shape controllability and velocity controllability, thereby solving their ...
Sergei Avdonin   +2 more
doaj   +1 more source

Functional generalized empirical likelihood estimation for conditional moment restrictions [PDF]

open access: yes, 2022
Important problems in causal inference, economics, and, more generally, robust machine learning can be expressed as conditional moment restrictions, but estimation becomes challenging as it requires solving a continuum of unconditional moment ...
Muandet, Krikamol   +3 more
core   +1 more source

On bounded complex Jacobi matrices and related moment problems in the complex plane [PDF]

open access: yesSurveys in Mathematics and its Applications, 2023
In this paper we consider the following moment problem: find a positive Borel measure μ on ℂ subject to conditions ∫ zn dμ = sn, n∈ℤ+, where sn are prescribed complex numbers (moments).
Sergey M. Zagorodnyuk
doaj  

Optimization problems for construction foundations

open access: yesLietuvos Matematikos Rinkinys, 2000
The mathematical models for optimization of grillage-type foundations are presented. Minimi­sing of maximum in absolute value vertical reactive force, bending moment, and reaction-bending moment together is sought.
Rimantas Belevičius   +1 more
doaj   +3 more sources

Moment Problems in Hereditary Function Spaces

open access: yesConcrete Operators, 2019
We introduce a concept of hereditary set of multi-indices, and consider vector spaces of functions generated by families associated to such sets of multi-indices, called hereditary function spaces.
Vasilescu Florian-Horia
doaj   +1 more source

Integral representations for harmonic and biharmonic functions in the unit ball (in Russian) [PDF]

open access: yesМатематичні Студії, 2013
In the paper an analytical solution of the analytic continuation problem in the unit N-dimensional ball by its values on the inner sphere is found. A generalization of the classical Poisson formula is obtained.
O. E. Yaremko
doaj  

How Difficult Was It? Metacognitive Judgments About Problems and Their Solutions After the Aha Moment

open access: yesFrontiers in Psychology, 2022
The insight phenomenon is thought to comprise two components: cognitive and affective (the Aha! experience). The exact nature of the Aha! experience remains unclear; however, several explanations have been put forward.
Nadezhda V. Moroshkina   +6 more
doaj   +1 more source

The Hausdorff Moment Problem [PDF]

open access: yesCanadian Mathematical Bulletin, 1978
Suppose throughout thatand that {μn}(n≥ 0) is a sequence of real numbers. The (generalized) Hausdorff moment problem is to determine necessary and sufficient conditions for there to be a function x in some specified class satisfying.
openaire   +1 more source

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