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Was Ulam right? Cardinal function Aronszajn tree Ascending path Strongly compact cardinal polarized partition relation Partition relations for trees higher Baire space Singular cofinality Diamond-sharp stationary reflection free Boolean algebra Distributive tree Slim tree diamond star C-sequence indecomposable filter O-space square principles Prikry-type forcing Rainbow sets Kurepa Hypothesis Singular cardinals combinatorics Monotonically far incompactness Reduced Power Subtle tree property Large Cardinals Shelah's Strong Hypothesis Commutative projection system Well-behaved magma Almost countably chromatic very good scale club_AD transformations regressive Souslin tree Nonspecial tree middle diamond L-space Intersection model Universal Sequences Almost Souslin Cardinal Invariants Subtle cardinal Lipschitz reduction Postprocessing function Reflecting stationary set PFA(S)[S] ZFC construction weak Kurepa tree Diamond full tree Uniformization Prevalent singular cardinals Ramsey theory over partitions Absoluteness Martin's Axiom approachability ideal Axiom R Sakurai's Bell inequality Sigma-Prikry Mandelbrot set PFA Fodor-type reflection Antichain Ulam matrix Non-saturation strongly bounded groups Respecting tree Souslin Tree nonmeager set Dowker space Luzin set Entangled linear order HOD Vanishing levels Weakly compact cardinal Countryman line tensor product graph Open Access Forcing square Ascent Path weak square GMA xbox Constructible Universe Chang's conjecture positive partition relation Partition Relations coloring number Rado's conjecture perfectly normal Uniformly coherent Ineffable cardinal Commutative cancellative semigroups Ostaszewski square specializable Souslin tree sap Erdos-Hajnal graphs Microscopic Approach Forcing Axioms Uniformly homogeneous Diamond for trees super-Souslin tree Interval topology on trees Hereditarily Lindelöf space stick Subnormal ideal Hindman's Theorem SNR S-Space Sierpinski's onto mapping principle Generalized Clubs Erdos Cardinal Amenable C-sequence Closed coloring reflection principles OCA Subadditive unbounded function Selective Ultrafilter Club Guessing Local Club Condensation. Strong coloring Forcing with side conditions Foundations Filter reflection Analytic sets b-scale Coherent tree Cohen real free Souslin tree Strongly Luzin set Parameterized proxy principle countably metacompact Precaliber Generalized descriptive set theory Greatly Mahlo weak diamond Poset Rock n' Roll stationary hitting Knaster Small forcing Successor of Regular Cardinal Jonsson cardinal AIM forcing Almost-disjoint family Singular Density Dushnik-Miller Whitehead Problem Fat stationary set Minimal Walks ccc Successor of Singular Cardinal Knaster and friends Chromatic number P-Ideal Dichotomy Iterated forcing Fast club 54G20 projective Boolean algebra Hedetniemi's conjecture Square-Brackets Partition Relations
Tag Archives: Mandelbrot set
A natural Mandelbrot set
Chris Hadfield is a Canadian astronaut, with a very high-profile twitter account. He posts there beautiful photos everyday, and I (plus half a million followers) enjoy it very much. Today, Chris posted the following picture: and I find it quite … Continue reading
