Edu

 6 Using unit circle to explain $\cos(0) = 1$ and $\sin(90) = 1$ 5 Proving that a complex number is nonreal. 5 Gaussian curvature from isometric embedding 4 Is this application of the chain rule correct? 4 Good partial differential equation books.

Reputation (1,435)

 +10 Gaussian curvature from isometric embedding +10 Parameterization of a torus +10 Radius of convergence of $\sum_{n=1}^\infty (-1)^n\;n\;4^n\;x^n$ +5 Existence of diagonal matrix that transforms invertible matrix in unitary

Questions (25)

 5 $(H^2-K) dA$ is globally invariant under inversions 4 Exponential boundedness for PDE 2 Radius of convergence of $\sum_{n=1}^\infty (-1)^n\;n\;4^n\;x^n$ 2 Proof from “An isoperimetric inequality with applications to curve shortening” by Gage 2 Existence of diagonal matrix that transforms invertible matrix in unitary

Tags (82)

 17 differential-geometry × 26 7 geometry × 12 16 reference-request × 6 7 trigonometry × 3 10 riemannian-geometry × 3 6 calculus × 6 9 curvature × 8 5 pde × 5 8 algebra-precalculus × 2 5 complex-numbers × 3

Accounts (9)

 Mathematics 1,435 rep 1620 MathOverflow 157 rep 116 Mathematica 147 rep 6 Sports 146 rep 5 Italian Language 138 rep 5