Changes between Version 24 and Version 26 of Ticket #29581


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Timestamp:
Jul 23, 2021, 11:27:46 PM (17 months ago)
Author:
Michael Jung
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  • Ticket #29581

    • Property Status changed from needs_work to needs_info

  • Ticket #29581 – Description

    v24 v26  
    11The current algorithm for characteristic forms is comparably low. The worst case scenario showed computations times about 1h in dimension four.
    22
    3 With this ticket, we want to replace the current algorithm and implement characteristic cohomology classes as sub-ring of the de Rham cohomology ring.
     3With this ticket, we want to replace the current algorithm and implement characteristic cohomology classes as sub-ring of the de Rham cohomology ring (cf. #31691).
    44
    5 The 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.
     5The algorithms are based on the Faddeev-LeVerrier algorithm (cf. #30681). 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.