Wszystkie pola: spectrum problem - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The spectrum problem for digraphs of order 4 and size 5
Autorzy:: Bunge, R. C.
DeShong, S,
El-Zanati, S. I.
Fischer, A.
Roberts, D. P.
Teng, L.
Powiązania:: https://bibliotekanauki.pl/articles/255132.pdf
Data publikacji:: 2018
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: spectrum problem
digraph decompositions
Opis:: The paw graph consists of a triangle with a pendant edge attached to one of the three vertices. We obtain a multigraph by adding exactly one repeated edge to the paw. Now, let D be a directed graph obtained by orientating the edges of that multigraph. For 12 of the 18 possibilities for D, we establish necessary and sufficient conditions on n for the existence of a [formula] design. Partial results are given for the remaining 6 possibilities for D.
Źródło:: Opuscula Mathematica; 2018, 38, 1; 15-30
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Continuous spectrum of Steklov nonhomogeneous elliptic problem
Autorzy:: Allaoui, M.
Powiązania:: https://bibliotekanauki.pl/articles/254696.pdf
Data publikacji:: 2015
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: Steklov problem
critical point theorem
p(x)-Laplacian
Opis:: By applying two versions of the mountain pass theorem and Ekeland's variational principle, we prove three different situations of the existence of solutions for the following Steklov problem: [formula] where Ω ⊂ RN (N ≥ 2) is a bounded smooth domain and p, q: Ω → (1, + ∞) are continuous functions.
Źródło:: Opuscula Mathematica; 2015, 35, 6; 853-866
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Application of Greens operator to quadratic variational problems
Autorzy:: Azbelev, N. V.
Tsalyuk, V. Z.
Powiązania:: https://bibliotekanauki.pl/articles/255629.pdf
Data publikacji:: 2006
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: quadratic variational problem
Sobolev space
boundary value problem
Hilbert space
Green's operator
Fredholm integral operator
spectrum
Opis:: We use Green's function of a suitable boundary value problem to convert the variational problem with quadratic functional and linear constraints to the equivalent unconstrained extremal problem in some subspace of the space L2 of quadratically summable functions. We get the neccessary and sufficient criterion for unique solvability of the variational problem in terms of the spectrum of some integral Hilbert-Schmidt operator in L2 with symmetric kernel. The numerical technique is proposed to estimate this criterion. The results are demonstrated on examples: 1) a variational problem with deviating argument, and 2) the problem of the critical force for the vertical pillar with additional support point (the qualities of the pillar may vary discontinuously along the pillar's axis).
Źródło:: Opuscula Mathematica; 2006, 26, 2; 243-256
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Higher order Nevanlinna functions and the inverse three spectra problem
Autorzy:: Boyko, O.
Martinyuk, O.
Pivovarchik, V.
Powiązania:: https://bibliotekanauki.pl/articles/255907.pdf
Data publikacji:: 2016
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: spectrum
eigenvalue
Dirichlet boundary condition
Neumann boundary condition
Marchenko equation
Nevanlinna function
Opis:: he three spectra problem of recovering the Sturm-Liouville equation by the spectrum of the Dirichlet-Dirichlet boundary value problem on [0, α], the Dirichlet-Dirichlet problem on [0, α/2] and the Neumann-Dirichlet problem on [α/2, α] is considered. Sufficient conditions of solvability and of uniqueness of the solution to such a problem are found.
Źródło:: Opuscula Mathematica; 2016, 36, 3; 301-314
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Eigenvalue-eigenfunction problem for Steklovs smoothing operator and differential-difference equations of mixed type
Autorzy:: Iakovlev, S. I.
Iakovleva, V.
Powiązania:: https://bibliotekanauki.pl/articles/254795.pdf
Data publikacji:: 2013
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: Steklov's smoothing operator
spectrum
eigenvalues
eigenfunctions
mixed-type differential-difference equations
initial function
method of steps
countably normed space
transformation group
generator
Opis:: It is shown that any μ ∈ C is an infinite multiplicity eigenvalue of the Steklov smoothing operator Sh acting on the space [formula]. For μ ≠ 0 the eigenvalue-eigenfunction problem leads to studying a differential-difference equation of mixed type. An existence and uniqueness theorem is proved for this equation. Further a transformation group is defined on a countably normed space of initial functions and the spectrum of the generator of this group is studied. Some possible generalizations are pointed out.
Źródło:: Opuscula Mathematica; 2013, 33, 1; 81-98
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

Artykuł

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