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Successor of Singular Cardinal Selective Ultrafilter Nonspecial tree Was Ulam right unbounded function Chang's conjecture Filter reflection Dushnik-Miller Mandelbrot set Fast club positive partition relation stick Large Cardinals Well-behaved magma Non-saturation full tree Absoluteness club_AD Small forcing Martin's Axiom tensor product graph Greatly Mahlo Almost Souslin weak diamond transformations Analytic sets middle diamond OCA Fat stationary set Diamond sap Singular cofinality very good scale weak square stationary hitting Ineffable cardinal Slim tree Successor of Regular Cardinal Strong coloring Jonsson cardinal Uniformly coherent Constructible Universe specializable Souslin tree Subtle cardinal Coherent tree Lipschitz reduction countably metacompact Diamond for trees Aronszajn tree Diamond-sharp polarized partition relation Reduced Power higher Baire space Ulam matrix ZFC construction GMA Commutative cancellative semigroups L-space Chromatic number free Souslin tree Closed coloring Cardinal Invariants C-sequence coloring number Ostaszewski square ccc Local Club Condensation. regressive Souslin tree SNR super-Souslin tree Hindman's Theorem Rainbow sets Iterated forcing Uniformization free Boolean algebra O-space strongly bounded groups Antichain projective Boolean algebra Poset Prevalent singular cardinals Knaster and friends Vanishing levels Microscopic Approach Whitehead Problem Universal Sequences Precaliber Axiom R 54G20 AIM forcing HOD Forcing Souslin Tree P-Ideal Dichotomy Prikry-type forcing Almost-disjoint family Dowker space Square-Brackets Partition Relations Amenable C-sequence Distributive tree Forcing Axioms Ramsey theory over partitions Postprocessing function Knaster indecomposable ultrafilter Minimal Walks incompactness b-scale Uniformly homogeneous Kurepa Hypothesis Reflecting stationary set Sakurai's Bell inequality Erdos-Hajnal graphs S-Space Foundations Singular cardinals combinatorics Rock n' Roll Club Guessing Generalized Clubs PFA stationary reflection Open Access Singular Density Rado's conjecture square principles Generalized descriptive set theory Parameterized proxy principle Shelah's Strong Hypothesis nonmeager set Hedetniemi's conjecture Subtle tree property reflection principles Erdos Cardinal Weakly compact cardinal Partition Relations Luzin set Subnormal ideal square PFA(S)[S] approachability ideal Almost countably chromatic Sigma-Prikry Subadditive Sierpinski's onto mapping principle Cardinal function diamond star Ascent Path Fodor-type reflection Cohen real xbox Hereditarily Lindelöf space Strongly Luzin set
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