Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Michael Hrušák"'
Autor:
Osvaldo Guzmán, Michael Hrušák
Publikováno v:
European Journal of Mathematics. 8:309-334
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad417be9f8cb1ff0805c432fb6c20153
https://doi.org/10.1007/s40879-021-00512-6
https://doi.org/10.1007/s40879-021-00512-6
Publikováno v:
Journal of Mathematical Logic. 23
A question dating to Mardešić and Prasolov’s 1988 work [S. Mardešić and A. V. Prasolov, Strong homology is not additive, Trans. Amer. Math. Soc. 307(2) (1988) 725–744], and motivating a considerable amount of set theoretic work in the years s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0821d3d789bb704a38717b0b571e4b1d
https://doi.org/10.1142/s0219061322500192
https://doi.org/10.1142/s0219061322500192
Publikováno v:
The Journal of Symbolic Logic. 86:855-870
We investigate the Tukey order in the class of $F_{\sigma }$ ideals of subsets of $\omega $ . We show that no nontrivial $F_{\sigma }$ ideal is Tukey below a $G_{\delta }$ ideal of compact sets. We introduce the notions of flat ideals and gradually f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cdbaa5651de4f24fd702c3465cb1c96
https://doi.org/10.1017/jsl.2021.30
https://doi.org/10.1017/jsl.2021.30
Publikováno v:
Israel Journal of Mathematics. 242:769-795
An interval algebra is a Boolean algebra which is isomorphic to the algebra of finite unions of half-open intervals, of a linearly ordered set. An interval algebra is hereditary if every subalgebra is an interval algebra. We answer a question of M. B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1754834f28b519a8ea66be8ff31dbeac
https://doi.org/10.1007/s11856-021-2146-9
https://doi.org/10.1007/s11856-021-2146-9
Publikováno v:
Fundamenta Mathematicae. 254:15-47
An almost disjoint family $\mathcal A$ of subsets of $\mathbb N$ is said to be $\mathbb R$-embeddable if there is a function $f:\mathbb N\rightarrow \mathbb R$ such that the sets $f[A]$ are ranges of real sequences converging to distinct reals for di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31bf886d6e39d6de7bbead4964676c4c
https://doi.org/10.4064/fm780-8-2020
https://doi.org/10.4064/fm780-8-2020
Publikováno v:
Transactions of the Americal Mathematical Society, 374(2), 1277-1296. American Mathematical Society
We construct, in $\mathsf{ZFC}$, a countably compact subgroup of $2^{\mathfrak{c}}$ without non-trivial convergent sequences, answering an old problem of van Douwen. As a consequence we also prove the existence of two countably compact groups $\mathb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9be71d3a521e66f989d425cc9a7cbcf9
https://doi.org/10.1090/tran/8222
https://doi.org/10.1090/tran/8222
Publikováno v:
Acta Mathematica Hungarica. 163:309-322
An infinite graph is highly connected if the complement of any subgraph of smaller size is connected. We consider weaker versions of Ramsey’s Theorem asserting that in any coloring of the edges of a complete graph there exist large highly connected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f2cfed510d464fb5ad45c40f3c75721
https://doi.org/10.1007/s10474-020-01058-x
https://doi.org/10.1007/s10474-020-01058-x
Publikováno v:
Topology and its Applications. 323:108274
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::029bbf44a208b0bbec04e8ff33059f9b
https://doi.org/10.1016/j.topol.2022.108274
https://doi.org/10.1016/j.topol.2022.108274
Autor:
Mirna Džamonja, Joan Hart, Andrea Medini, Andrés Villaveces, István Juhász, H. Jerome Keisler, Steffen Lempp, Arnold W Miller, Justin Tatch Moore, Frank Tall, Alan Dow, Michael Hrušák, Jan van Mill, Stephen Jackson, Donald A Martin, Peter Nyikos, Dilip Raghavan, John Steel, Hugh Woodin
Publikováno v:
Notices of the American Mathematical Society. 69:1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9784ed92201d7c92c98b46f6ed73590
https://doi.org/10.1090/noti2570
https://doi.org/10.1090/noti2570
Publikováno v:
The Journal of Symbolic Logic. 85:149-165
Let ${\cal I}$ be an ideal on ω. By cov${}_{}^{\rm{*}}({\cal I})$ we denote the least size of a family ${\cal B} \subseteq {\cal I}$ such that for every infinite $X \in {\cal I}$ there is $B \in {\cal B}$ for which $B\mathop \cap \nolimits X$ is inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86a8f570c1c1aa2a8a11c790dfd9635f
https://doi.org/10.1017/jsl.2019.76
https://doi.org/10.1017/jsl.2019.76