Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Ziemowit Rzeszotnik"'
Autor:
Ziemowit Rzeszotnik, Marcin Bownik
Publikováno v:
Operator Theory, Operator Algebras and Their Interactions with Geometry and Topology ISBN: 9783030433796
We present a collection of easily stated open problems in wavelet theory and we survey the current status of answering them. This includes a problem of Larson ((2007) Unitary systems and Wavelet sets. In: Wavelet analysis and applications. Applied an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc222309d93497d7aa591ba97059559c
https://doi.org/10.1007/978-3-030-43380-2_4
https://doi.org/10.1007/978-3-030-43380-2_4
Autor:
Hartmut Führ, Ziemowit Rzeszotnik
Publikováno v:
Linear Algebra and its Applications. 547:32-44
The note concerns three factorizations of unitary matrices: a recent factorization allowing to obtain any unitary matrix of dimension 2n from four unitary matrices of dimension n; the Cosine–Sine decomposition; and a new factorization decomposing a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92159ec41f8fef024628843511da6f03
https://doi.org/10.1016/j.laa.2018.02.017
https://doi.org/10.1016/j.laa.2018.02.017
Publikováno v:
Biophysical Journal. 118:565a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91e120c14b4feb7f1c9cbf540b79d51c
https://doi.org/10.1016/j.bpj.2019.11.3080
https://doi.org/10.1016/j.bpj.2019.11.3080
Autor:
Hartmut Führ, Ziemowit Rzeszotnik
Publikováno v:
Linear Algebra and its Applications. 484:86-129
A biunimodular vector of a unitary matrix A ∈ U ( n ) is a vector v ∈ T n ⊂ C n such that Av ∈ T n as well. Over the last 30 years, the sets of biunimodular vectors for Fourier matrices have been the object of extensive research in various ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e7811475a524864f2aff7b56fa25094
https://doi.org/10.1016/j.laa.2015.06.019
https://doi.org/10.1016/j.laa.2015.06.019
Publikováno v:
Integral Equations and Operator Theory. 67:183-202
The finite section method is a classical scheme to approximate the solution of an infinite system of linear equations. Based on an axiomatic framework we present a convergence analysis of the finite section method for unstructured matrices on weighte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::febc2e0db05f3b1cb166732d6939cff2
https://doi.org/10.1007/s00020-010-1775-x
https://doi.org/10.1007/s00020-010-1775-x
Autor:
John E. Gilbert, Ziemowit Rzeszotnik
Publikováno v:
Annales de l’institut Fourier. 60:1317-1346
Pour les valeurs de p et q comprises entre 1 et l'infini, nous determinons la norme de la transformee de Fourier de l'espace L p d'un groupe abelien fini vers l'espace L q du groupe dual.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb940262166abbd52a74dbbd0c1fbb4b
https://doi.org/10.5802/aif.2556
https://doi.org/10.5802/aif.2556
Publikováno v:
Cell Calcium
Intracellular free calcium concentrations ([Ca2+]i) are assessed by measuring indicator fluorescence in entire cells or subcellular regions using fluorescence microscopy. [Ca2+]i is calculated using equations which link fluorescence intensities (or i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42a2c97faa7cdff8d30fba94490d661c
https://doi.org/10.1016/j.ceca.2007.02.002
https://doi.org/10.1016/j.ceca.2007.02.002
Autor:
Ziemowit Rzeszotnik, Marcin Bownik
Publikováno v:
Mathematische Annalen. 332:705-720
We show that a compactly supported tight framelet comes from an MRA if the intersection of all dyadic dilations of the space of negative dilates, which is defined as the shift-invariant space generated by the negative scales of a framelet, is trivial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2f8f5cf0901d0c09726a415a9a17549
https://doi.org/10.1007/s00208-005-0645-3
https://doi.org/10.1007/s00208-005-0645-3
Autor:
Marcin Bownik, Ziemowit Rzeszotnik
Publikováno v:
Wavelets, Frames and Operator Theory. :49-59
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90b4b68032680280165a34cf1eb91d63
https://doi.org/10.1090/conm/345/06240
https://doi.org/10.1090/conm/345/06240
Autor:
Xiaofei Zhang, Ziemowit Rzeszotnik
Publikováno v:
Proceedings of the American Mathematical Society. 132:1463-1471
We characterize a special class of unitary operators that preserve orthonormal wavelets. In the process we also prove that symmetric wavelet sets cover the real line.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e11616d55ac80e6723bfcd1379e1892
https://doi.org/10.1090/s0002-9939-03-07255-1
https://doi.org/10.1090/s0002-9939-03-07255-1