Hans Lundmark's user avatar
Hans Lundmark's user avatar
Hans Lundmark's user avatar
Hans Lundmark
  • Member for 14 years
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11 votes

"Wild" solutions of the heat equation: how to graph them?

2 votes
Accepted

Ramp and Cliff Solutions to the Viscous Burgers Equation: Explicit Formula?

2 votes

Undergraduate Level Math Books

3 votes

Geodesics on a hyperbolic paraboloid

13 votes

Are there other nice math books close to the style of Tristan Needham?

6 votes

Errata for Atiyah–Macdonald

3 votes

Bertrand theorem - central forces

4 votes

Nice Classes of Non-Closable Operators

5 votes
Accepted

Local linearization of ODE at singular point

3 votes

What's your favorite equation, formula, identity or inequality?

17 votes

Strengthening the induction hypothesis

7 votes

Eigenvectors of a certain big upper triangular matrix

0 votes

A plausible inequality

2 votes

If the second derivative of a function on $\mathbb R^n$ is everywhere nondegenerate, does it follow that the first derivative is an injection?