Changes between Version 26 and Version 38 of Ticket #29581
 Timestamp:
 08/18/21 13:06:32 (9 months ago)
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Ticket #29581

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#32270, #32272, #32396

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3c9b80a2551994493f23640344e9ade63240cb01
to2cabd839d55e5c0f3ba2f8d0194bcae6ce31397c

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Ticket #29581 – Description
v26 v38 1 The current algorithm for characteristic forms is comparably low. The worst case scenario showed computations times about 1h in dimension four.1 The current algorithm for characteristic forms is comparably slow. The worst case scenario showed computations times about 1h in dimension four. 2 2 3 3 With this ticket, we want to replace the current algorithm and implement characteristic cohomology classes as subring of the de Rham cohomology ring (cf. #31691). 4 4 5 The algorithms are based on the FaddeevLeVerrier 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.5 The idea is that characteristic (cohomology) classes are generated by Chern/Pontryagin/Euler classes. The generators can be computed by an FaddeevLeVerrierlike algorithm (cf. #30681).