Archives
Keywords
PFA(S)[S] sap indecomposable ultrafilter Coherent tree Countryman line Ramsey theory over partitions Uniformly homogeneous Diamond-sharp Nonspecial tree ccc PFA Absoluteness Fodor-type reflection Ineffable cardinal weak square Subtle cardinal Singular cofinality higher Baire space incompactness Aronszajn tree Cardinal Invariants transformations Minimal Walks Kurepa Hypothesis Reflecting stationary set polarized partition relation Strong coloring Distributive tree Diamond Prikry-type forcing Rado's conjecture Club Guessing Mandelbrot set Strongly Luzin set Sierpinski's onto mapping principle Axiom R regressive Souslin tree Precaliber Intersection model Postprocessing function Vanishing levels 54G20 Rainbow sets Hereditarily Lindelöf space Open Access Commutative cancellative semigroups Dowker space Singular Density Uniformization Luzin set Almost Souslin Constructible Universe HOD Large Cardinals Sakurai's Bell inequality Almost-disjoint family Respecting tree square principles full tree unbounded function Uniformly coherent Microscopic Approach Chang's conjecture O-space Reduced Power Subnormal ideal square reflection principles Martin's Axiom Subtle tree property specializable Souslin tree Shelah's Strong Hypothesis projective Boolean algebra Cardinal function Ulam matrix L-space Slim tree Forcing Axioms stationary hitting Square-Brackets Partition Relations positive partition relation Erdos-Hajnal graphs middle diamond Generalized Clubs Parameterized proxy principle Small forcing GMA Singular cardinals combinatorics Weakly compact cardinal Greatly Mahlo S-Space Jonsson cardinal b-scale Diamond for trees Iterated forcing Hindman's Theorem Fast club Souslin Tree Partition Relations strongly bounded groups Foundations coloring number Universal Sequences C-sequence stationary reflection Subadditive Amenable C-sequence free Boolean algebra Was Ulam right Commutative projection system Knaster very good scale Local Club Condensation. Sigma-Prikry nonmeager set Whitehead Problem weak Kurepa tree Ascent Path super-Souslin tree Filter reflection Lipschitz reduction weak diamond Fat stationary set Prevalent singular cardinals Hedetniemi's conjecture approachability ideal Closed coloring tensor product graph Dushnik-Miller Cohen real Poset Selective Ultrafilter Strongly compact cardinal Rock n' Roll Ostaszewski square Generalized descriptive set theory SNR stick Successor of Singular Cardinal Successor of Regular Cardinal Analytic sets OCA P-Ideal Dichotomy ZFC construction Chromatic number Forcing Non-saturation free Souslin tree Erdos Cardinal countably metacompact club_AD diamond star xbox AIM forcing Antichain Knaster and friends Almost countably chromatic Well-behaved magma
Tag Archives: countably metacompact
Diamond on ladder systems and countably metacompact topological spaces
Joint work with Rodrigo Rey Carvalho and Tanmay Inamdar. Abstract. Leiderman and Szeptycki proved that a single Cohen real introduces a ladder system $L$ over $\aleph_1$ for which the space $X_L$ is not a $\Delta$-space. They asked whether there is … Continue reading →
Posted in Preprints, Topology
|
Tagged 03E05, 54G20, C-sequence, countably metacompact, Diamond, middle diamond, Open Access, weak diamond, ZFC construction
|
3 Comments