Changes between Initial Version and Version 1 of Ticket #32953, comment 3


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Timestamp:
Dec 2, 2021, 12:27:17 PM (14 months ago)
Author:
Tobias Diez
Comment:

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  • Ticket #32953, comment 3

    initial v1  
    66Currently, it is as a list of frames for which the chart transitions are orientation-preserving.
    77More generally one can assign to each chart (or frame) a sign, where two such signs have to be equal if the chart transition is orientation-preserving and otherwise they have to differ (thatt is, a 0-cochain trivializating the Z_2-valued orientation 1-cocycle).
    8 Using this extension, one could simply say that the chart on NP-0 gets a minus sign instead of needing to introduce a new frame.
     8Using this extension, one could simply say that the chart on SP-NP gets a minus sign instead of needing to introduce a new frame.
    99
    1010What do you think?