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For questions about the discipline that uses differential calculus and linear algebra to study geometrical problems.

4 votes
1 answer
220 views

Did anybody consider the product of the principal curvatures before Gauss?

Gauss proved that the so-called Gaussian curvature is an intrinsic invariant of the surface, even though it is defined extrinsically as the product of the principal curvatures of a Euclidean embedding …
Mikhail Katz's user avatar
  • 6,684
3 votes
0 answers
266 views

Priority on lemniscate of Gerono?

The Lemniscate of Gerono is a special case of the Lissajous curves. The dates for the two mathematicians are fairly close: Gerono (1799-1891) and Lissajous (1822-1880). Historically who has priority …
Mikhail Katz's user avatar
  • 6,684