Changes between Version 24 and Version 26 of Ticket #29581
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 07/23/21 23:27:46 (5 months ago)
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Ticket #29581

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toneeds_info

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Ticket #29581 – Description
v24 v26 1 1 The current algorithm for characteristic forms is comparably low. The worst case scenario showed computations times about 1h in dimension four. 2 2 3 With this ticket, we want to replace the current algorithm and implement characteristic cohomology classes as subring of the de Rham cohomology ring .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 . 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 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.