A Crossed Module giving the Godbillon-Vey Cocycle
Wagemann, Friedrich
HAL, hal-00008865 / Harvested from HAL
Text on HAL
We find crossed modules, i.e. certain 4 term exact sequences, associated to the Godbillon-Vey class for W_1, Vect(S^1), Vect_{1,0}(\\Sigma) and Hol(\\Sigma_r), i.e. for the Lie algebras of formal vector fields in 1 variable, vector fields on the circle, differentiable vector fields of holomorphic type on a Riemann surface and holomorphic vector fields on an open Riemann surface.
Publié le : 2000-07-05
Classification:  [MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph],  [PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph],  [MATH.MATH-QA]Mathematics [math]/Quantum Algebra [math.QA] 
@article{hal-00008865,
     author = {Wagemann, Friedrich},
     title = {A Crossed Module giving the Godbillon-Vey Cocycle},
     journal = {HAL},
     volume = {2000},
     number = {0},
     year = {2000},
     language = {en},
     url = {http://dml.mathdoc.fr/item/hal-00008865}
}

Wagemann, Friedrich. A Crossed Module giving the Godbillon-Vey Cocycle. HAL, Tome 2000 (2000) no. 0, . http://gdmltest.u-ga.fr/item/hal-00008865/