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comment What is the “real” meaning of the $\hat A$ class (or the Todd class)?
FWIW, in the context of Atiyah-Singer, I liked to think of the Chern character as encoding analytic properties, and the Todd class as encoding geometrical properties.
Jan
25
asked The lattice of graphs under vertex abstractions
Jan
25
comment Evaluate a Function to Full Machine Precision
en.wikipedia.org/wiki/Pad%C3%A9_approximant
Jan
24
comment States in C*-algebras and their origin in physics?
en.wikipedia.org/wiki/Tomita%E2%80%93Takesaki_theory ... pretty relevant to physics IMO
Jan
21
comment Exact determinant of a circulant matrix
You might be able to adapt "black-box linear algebra" a la Wiedemann to do this. See also oeis.org/A215897
Jan
5
comment Geometric Characterization of Martingales
amazon.com/Stochastic-Analysis-Manifolds-Graduate-Mathematics/…
Jan
5
comment Cycles of length $2^n - 2$ in the De Bruijn graph
Have you tried using this? en.wikipedia.org/wiki/Matrix_determinant_lemma
Dec
31
comment Simplifying product of matrix exponential?
en.wikipedia.org/wiki/…
Dec
31
comment Probabilistic Proofs of Analytic Facts
@Turbo - Treat the heat kernel as a transition density as in section 4.1 of the book mentioned in my comment above
Dec
24
comment What is known about first return times to Markov partitions for Anosov diffeomorphisms?
Thanks for your answer. A bit after I asked this question some physical considerations led me to be primarily concerned with variants of the $L^2$ mixing time and topological entropy as timescales of interest--I still don't know how to define the timescale I really want, but these are close for systems that can't be written as products.
Dec
7
comment Sophisticated treatments of topics in school mathematics
76888math106.wordpress.com/category/extra-credit
Dec
5
awarded  Good Answer
Nov
29
awarded  Nice Answer
Nov
26
revised What characterizations of relative information are known?
added 113 characters in body
Nov
26
answered What characterizations of relative information are known?
Nov
19
awarded  Famous Question
Nov
13
awarded  Generalist
Nov
12
revised Finding a semigroup that maximizes the trace of a sum of matrices
added 12 characters in body
Nov
12
answered Finding a semigroup that maximizes the trace of a sum of matrices
Nov
12
comment An alternative to the Euler--Maclaurin formula: Approximating sums by integrals only
books.google.com/books?id=laweX9bzDM8C