Found 559 Documents (Results 1–100)
On certain star versions of a \(\mathrm{U}_{\mathrm{fin}}\)-type selection principle. (English) Zbl 07900752
Reviewer: Zuquan Li (Hangzhou)
Restricted orbits of closed range operators and equivalences between frames for subspaces. (English) Zbl 07887998
Reflexivity index of the product of some topological spaces and lattices. (English) Zbl 07828717
Reviewer: Kyriakos Papadopoulos (Safat)
Spectral representation of absolutely minimum attaining unbounded normal operators. (English) Zbl 07812143
Invariant subspaces and eigenvalues of the three-particle discrete Schrödinger operators. (English. Russian original) Zbl 1543.81101
Russ. Math. 67, No. 9, 1-15 (2023); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2023, No. 9, 3-19 (2023).
On the closedness of the sum of subspaces of the space \(B(H,Y)\) consisting of operators whose kernels contain given subspaces of \(H\). (English) Zbl 07763127
Reviewer: Elhadj Dahia (Bou Saâda)
Characterization of some closed linear subspaces of Morrey spaces and approximation. (English) Zbl 1521.42019
A study of Bishop operators from the point of view of linear dynamics. (English) Zbl 07693142
Reviewer: José Bonet (València)
Further investigations on certain star selection principles. (English) Zbl 1522.54036
Reviewer: Maddalena Bonanzinga (Messina)
Preopen sets and prelocally closed sets in generalised topology and minimal structure spaces. (English) Zbl 1504.54001
On \(\mathcal{T}\)-ft sets and the hyperspace of \(\mathcal{T}\)-closed sets. (English) Zbl 1508.54018
Reviewer: Alejandro Illanes (Ciudad de México)
Effective equidistribution of closed hyperbolic subspaces in congruence quotients of hyperbolic spaces. (English) Zbl 1508.37017
Fisher, David (ed.) et al., Dynamics, geometry, number theory. The impact of Margulis on modern mathematics. Chicago, IL: The University of Chicago Press. 452-505 (2022).
Application of the open mapping theorem to Lomonosov theorem. (English) Zbl 1511.47007
Reviewer: Carlos S. Kubrusly (Rio de Janeiro)
A new complemented subspace for the Lorentz sequence spaces, with an application to its lattice of closed ideals. (English) Zbl 1504.46020
Exact solutions of a nonlinear diffusion equation on polynomial invariant subspace of maximal dimension. (English) Zbl 1491.35104
On certain star-\(K\) variant of a selection principle. arXiv:2208.12677
Preprint, arXiv:2208.12677 [math.GN] (2022).
On certain weaker forms of the Scheepers property. arXiv:2207.08819
Preprint, arXiv:2207.08819 [math.GN] (2022).
On certain star versions of the Scheepers property. arXiv:2207.08595
Preprint, arXiv:2207.08595 [math.GN] (2022).
Unifying the treatment of indefinite and semidefinite perturbations in the subspace perturbation problem. (English) Zbl 07515575
Reflexivity index and irrational rotations. (English) Zbl 07438217
Reviewer: Mohammed El Aïdi (Bogotá)
A note on traces of forms with applications to the Bessel operator. (English) Zbl 1542.47008
Jeribi, Aref (ed.), Operator theory. Proceedings of the international conference on operator theory, Hammamet, Tunisia, April 30 – May 3, 2018. Berlin: De Gruyter. De Gruyter Proc. Math., 75-84 (2021).
A general version of Neubauer’s lemma and closed range almost closed operators. (English) Zbl 1473.46035
The Wold decomposition of Hilbertian periodically correlated processes. (English) Zbl 1455.60058
Theory Probab. Math. Stat. 101, 119-127 (2020) and Teor. Jmovirn. Mat. Stat. 101, 106-114 (2019).
Closed subsets of compact-like topological spaces. (English) Zbl 1452.54012
Reviewer: Kateryna Pavlyk (Tartu)
An extreme value theorem on closed convex subsets of \(L^p\) spaces and two applications. (English) Zbl 1447.49027
Lattices of subspaces of vector spaces with orthogonality. (English) Zbl 1455.06006
Reviewer: Giuseppina Barbieri (Fisciano)
The hyperspace of \(\mathcal{T} \)-closed subcontinua. (English) Zbl 1441.54023
Reviewer: Alejandro Illanes (Ciudad de México)
Set-Menger and related properties. (English) Zbl 1437.54020
Reviewer: David B. Gauld (Auckland)
\( \alpha \)-Fredholm operators relative to invariant subspaces. (English) Zbl 1441.47010
Reviewer: Vladimir S. Pilidi (Rostov-na-Donu)
The problem of dispersion-free probabilities in Gleason-type theorems for a two-dimensional Hilbert space. (English) Zbl 1423.81030
A sufficient condition for the sum of complemented subspaces to be complemented. (English) Zbl 1424.46027
MSC:
46B25
Complex interpolation of certain closed subspaces of generalized Morrey spaces. (English) Zbl 1419.46019
Comparing spaces by means of 2-homeomorphisms. (English) Zbl 1414.54007
Reviewer: Ruzinazar Beshimov (Tashkent)
Some properties and mappings on weakly \(\nu \)-Lindelöf generalized topological spaces. (English) Zbl 1412.54002
Finiteness of the space of \(n\)-cycles for a reduced \((n-2)\)-concave complex space. (Finitude de l’espace des \(n\)-cycles pour un espace complexe \((n-2)\)-concave réduit.) (English. French summary) Zbl 1457.32033
New proofs of theorems of Michael and Worrell. (English) Zbl 1362.54022
Reviewer: Zuquan Li (Hangzhou)
General topology. Reprint of the 1955 original published by van Nostrand. (English) Zbl 1358.54001
Mineola, NY: Dover Publications (ISBN 978-0-486-81544-2). xiv, 298. (2017).
MSC:
54-01
54E15
54E35
03-01
03E30
03E25
03E20
54A05
54A20
54B05
54B15
54B10
54C05
54C10
54C35
54Dxx
Epireflective subcategories of TOP, \(T_2\)UNIF, UNIF, closed under epimorphic images, or being algebraic. (English) Zbl 1399.54060
Reviewer: Salvador Hernández (Castellón)
Spaces with star countable extent. (English) Zbl 1413.54084
Reviewer: Wei-Xue Shi (Nanjing)
A note on closedness of the sum of two closed subspaces in a Banach space. (English) Zbl 1361.46021
MSC:
46B99
On an aspect of scatteredness in the point-free setting. (English) Zbl 1353.06003
Reviewer: Themba Dube (Unisa)
A weakening of submetrizability and properties of spaces. (English) Zbl 1346.54010
Reviewer: Szymon Plewik (Katowice)
Soft topological subspaces. (English) Zbl 1334.54036
MSC:
54A40
Regular generalized closed sets in generalized topological spaces. (English) Zbl 1346.54002
Reviewer: Maximilian Ganster (Graz)
Reduction by symmetries in singular quantum-mechanical problems: general scheme and application to Aharonov-Bohm model. (English) Zbl 1330.81095
Remarks on star-Menger spaces II. (English) Zbl 1335.54027
Reviewer: Ljubiša D. Kočinac (Niš)
On closed discrete subsets of normal dense subspaces of products. (English) Zbl 1321.54007
Reviewer: Samuel Gomes da Silva (Salvador)
From local to global ideal-triangularizability. (English) Zbl 1321.47011
Reviewer: K. C. Sivakumar (Chennai)
Maps preserving complementarity of closed subspaces of a Hilbert space. (English) Zbl 1311.46022
Reviewer: Abdellatif Bourhim (Syracuse)
A note on star-Rothberger spaces. (English) Zbl 1300.54033
Reviewer: David B. Gauld (Auckland)
On the sum of two closed subspaces. (English) Zbl 1297.46004
Reviewer: José Bonet (Valencia)
Study on topological spaces with the semi-\(T_{\frac12}\) separation axiom. (English) Zbl 1300.54050
On the Borelness of the intersection operation. (English) Zbl 1292.46015
Reviewer: Gilles Godefroy (Paris)
An approach to solution of the Schrödinger equation using Fourier-type functionals. (English) Zbl 1266.60141
On one metric in the space of nonempty closed subsets of \(\mathbb R^n\). (Russian. English summary) Zbl 1299.54067
New results on the closedness of the product and sum of closed linear operators. (English) Zbl 1314.47003
More on \(\kappa \)-Ohio completeness. (English) Zbl 1249.54022
Reviewer: Richard G. Wilson (Mexico)
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