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You are here		mattbaker.blog Circles, the Basel Problem, and the Apparent Brightness of Stars \| Matt Baker's Math Blog
\|	\|	awwalker.com Sums of Squares and Density \| a. w. walker	3.1 parsecs away Travel
\|	\|	Classification theorems of Euler, Lagrange, and Legendre describe the sets of integers that can be written as the sum of 2, 3, and 4 squares. In the last two cases, it follows easily that the density of these sets are 5/6 and 1. The question of density is not so simple in the case of...	3.1 parsecs away Travel
\|	\|	fabricebaudoin.blog Lecture 8. Sobolev inequalities on Dirichlet spaces: The Varopoulos approach \| Research and Lecture notes	3.7 parsecs away Travel
\|	\|	In this lecture, we studySobolev inequalities on Dirichlet spaces. The approach we develop is related to Hardy-Littlewood-Sobolev theory The link between the Hardy-Littlewood-Sobolev theory and heat kernel upper bounds is due to Varopoulos, but the proof I give below I learnt it from my colleague RodrigoBañuelos. It bypasses the Marcinkiewicz interpolation theorem,that was originally used...	3.7 parsecs away Travel
\|	\|	thatsmaths.com The Golden Key to Riemann's Hypothesis - ThatsMaths	4.1 parsecs away Travel
\|	\|	The Riemann Hypothesis Perhaps the greatest unsolved problem in mathematics is to explain the distribution of the prime numbers. The overall ``thinning out'' of the primes less than some number $latex {N}&fg=000000$, as $latex {N}&fg=000000$ increases, is well understood, and is demonstrated by the Prime Number Theorem (PNT). In its simplest form, PNT states that...	4.1 parsecs away Travel
\|	\|	sarahgoodreau.com little beast. \| sarahgoodreau	15.4 parsecs away Travel
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