Similar to ダルブー座標

Theorema Egregium

Minimal surface

1 + 1 + 1 + 1 + ⋯

1/2 + 1/4 + 1/8 + 1/16 + ⋯

1/2 − 1/4 + 1/8 − 1/16 + ⋯

1/4 + 1/16 + 1/64 + 1/256 + ⋯

Hundredth

Two-form

Spherical coordinate system

Hamiltonian vector field

Canonical coordinates

Darboux's theorem

0

1

2

3

4

5

6

7

8

9

1048576

Saddle point

Euler's theorem (differential geometry)

Gaussian curvature

Gauss map