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8 votes
1 answer
635 views

Availability of a copy the first volume of Segre's "Forme differenziali e loro integrali"

I am precisely referring to the following, first volume of the textbook/lecture notes/monograph written by Beniamino Segre in the fifties of the twentieth century (I own a copy of the second volume) ...
Daniele Tampieri's user avatar
3 votes
0 answers
104 views

Understanding the Lie derivative by multivector fields

For a vector field $X$ on a manifold there are two ways to define a Lie derivative: an algebraic one using Cartan's formula $\mathcal{L}_X \alpha = i_X d \alpha + d i_X \alpha$ and a dynamical one ...
mlainz's user avatar
  • 161
3 votes
0 answers
304 views

Differential ideals of Pfaffian forms on jet bundles (Integrability)

(I asked this question on math.stackexchange, but got no reaction in several weeks. So, my conclusion is, that it is harder to answer than I thought, and maybe admissible for the attribute 'research ...
cknoll's user avatar
  • 203