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