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