Changes between Version 7 and Version 21 of Ticket #29581


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Timestamp:
07/23/21 22:51:55 (5 months ago)
Author:
gh-mjungmath
Comment:

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  • Ticket #29581

    • Property Status changed from new to needs_work
    • Property Cc tscrim mkoeppe added
    • Property Component changed from geometry to manifolds
    • Property Milestone changed from sage-9.2 to sage-9.5
    • Property Commit changed from 15c7341d071327a04fd229c3d2f78d583564f476 to 19815c4257cee7dcf503d94e3b9bb651150bef5f
  • Ticket #29581 – Description

    v7 v21  
    1 Alternative algorithm for characteristic classes involving chern roots.
     1The current algorithm for characteristic forms is comparably low. The worst case scenario showed computations times about 1h in dimension for.
     2
     3With this ticket, we want to replace the current algorithm and implement characteristic cohomology classes as sub-ring of the de Rham cohomology ring.
     4
     5The algorithms are based on the Faddeev-LeVerrier algorithm. The idea is that characteristic cohomology classes are determined by an element of the polynomial ring over Chern classes, Pontryagin classes and/or Euler classes.