14 research outputs found
Wide scattered spaces and morasses
We show that it is relatively consistent with ZFC that 2^omega is arbitrarily
large and every sequence s=(s_i:i<omega_2) of infinite cardinals with
s_i<=2^omega is the cardinal sequence of some locally compact scattered space.Comment: 14 page
HalmazelmĂ©let; PartĂciĂł kalkulus, VĂ©gtelen gráfok elmĂ©lete = Set Theory; Partition Calculus , Theory of Infinite Graphs
ElĹ‘zetes tervĂĽnknek megfelelĹ‘en a halmazelmĂ©let alábbi terĂĽletein vĂ©geztĂĽnk kutatást Ă©s Ă©rtĂĽnk el számos eredmĂ©nyt: I. Kombinatorika II. A valĂłsak számsosságinvariánsai Ă©s ideálelmĂ©let III. HalmazelmĂ©leti topolĂłgia Ezek mellett Sági Gábor kiterjedt kutatást vĂ©gzett a modellelmĂ©let terĂĽletĂ©n , amely eredmĂ©nyek kapcsolĂłdnak a kombinatorikához is. EredmĂ©nyeinket 38 közlemĂ©nyben publikáltuk, amelyek majdnem mind az adott terĂĽlet vezetĹ‘ nemzetközi lapjaiban jelentel meg (5 cikket csak benyĂşjtottunk). Számos nemzetközi konferencián is rĂ©sztvettĂĽnk, Ă©s hárman közűlĂĽnk (Juhász, Sádi, Soukup) plenáris/meghĂvott elĹ‘adĂłk voltak számos alkalommal. | Following our research plan, we have mainly done research -- and established a number of significant results -- in several areas of set theory: I. Combinatorics II. Cardinal invariants of the continuum and ideal theory III. Set-theoretic topology In addition to these, G. Sági has done extended research in model theory that had ramifications to combinatorics. We presented our results in 38 publications, almost all of which appeared or will appear in the leading international journals of these fields (5 of these papers have been submitted but not accepted as yet). We also participated at a number of international conferences, three of us (Juhász, Sági, Soukup) as plenary and/or invited speakers at many of these
Halmazelméleti topológia = Set-theoretic topology
Ebben az OTKA-pályázatban -- kutatási tervĂĽnknek megfelelĹ‘en -- kutatásokat vĂ©geztĂĽnk Ă©s jelentĹ‘s eredmĂ©nyeket Ă©rtĂĽnk el a következĹ‘ nĂ©gy terĂĽleten: (I) HalmazelmĂ©leti topolĂłgia (kompakt terek, szĂ©tszĂłrt terek, számosságfĂĽggvĂ©nyek, felbonthatĂłság) (II) LeĂrĂł halmazelmĂ©let (III) VĂ©gtelen Ă©s vĂ©ges kombinatorika (IV) ValĂłs analĂzis Ă©s mĂ©rtĂ©kelmĂ©let . EredmĂ©nyeinket 45 dolgozatban Ărtuk le, amelyek tĂşlnyomĂł többsĂ©ge a megfelelĹ‘ terĂĽlet legrangosabb nemzetközi folyĂłirataiban jelentek meg, illetve fognak megjelenni (ezek közĂĽl 6 dolgozatot már benyujtottunk, de eddig mĂ©g nem lettek elfogadva). KutatĂłcsoportunk 8 rĂ©sztvevĹ‘vel indult, de sajnos egyikĂĽnk -- Gerlits János) 2008-bqn elhunyt. Kutatási eredmĂ©nyeinkrĹ‘l számos nemzetközi konferencián is számot adtunk, sok esetben közĂĽlĂĽnk nĂ©gyen (Elekes, Juhász, Mátrai, Soukup) mint plenáris Ă©s/vagy meghĂvott elĹ‘adĂł. | In the present project, following our research plan, we have done research and established a number of significant results in the following four areas: (I) Set-theoretic topology (compact spaces, scattered spaces, cardinal functions, resolvability) (II) Descriptive set-theory (III) Infinite and finite combinatorics (IV) Real analysis and measure theory We presented our results in 45 papers almost all of which appeared or will appear in the leading international journals of these fields (6 of these papers have been submitted but not accepted as yet). Our research group consisted of 8 people, one of us -- J. Gerlits -- unfortunately passed away in 2008. We also participated at a large number of international conferences, four of us (Elekes, Juhász, Mátrai, Soukup) as plenary and/or invited speakers at many of these
Wider Thin-Very Tall Superatomic Boolean Algebras
For each regular cardinal k > w we show the consistent existence of a thin
very tall superatomic Boolean algebra of width k.Comment: There is a gap in claim 4.