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Results tagged with ca.classical-analysis-and-odes
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user 4008
Special functions, orthogonal polynomials, harmonic analysis, ordinary differential equations (ODE's), differential relations, calculus of variations, approximations, expansions, asymptotics.
13
votes
The dual group of $\mathbb Q$
Every continuous group homomorphism $\mathbb Q \rightarrow S^1$ extends to the
completion of $\mathbb Q$ (cf., Bourbaki: General topology, Prop. III:4.8) which
is $\mathbb R$ so the dual group of $\ma …
- 22.6k
20
votes
Accepted
What is the wild fundamental group?
Consider the category of algebraic integrable connections on a smooth connected algebraic variety $X$ with a base point $x$ (over a field of characteristic zero). This is a Tannakian category with a f …
- 22.6k