Changes between Initial Version and Version 1 of Ticket #32953, comment 3
- Timestamp:
- Dec 2, 2021, 12:27:17 PM (14 months ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
Ticket #32953, comment 3
initial v1 6 6 Currently, it is as a list of frames for which the chart transitions are orientation-preserving. 7 7 More 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-0gets a minus sign instead of needing to introduce a new frame.8 Using this extension, one could simply say that the chart on SP-NP gets a minus sign instead of needing to introduce a new frame. 9 9 10 10 What do you think?