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Timeline for "Star" of a CW-complex

Current License: CC BY-SA 4.0

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Mar 13 at 15:11 comment added brattok @HenrikRüping Thank you for the example but will this be still false for the star with punctured zero cell?
Mar 13 at 14:26 history edited gmvh CC BY-SA 4.0
Improved grammar and spelling
Mar 13 at 14:10 comment added HenrikRüping No. In a CW-complex you can attach cells in a weird way. For example, take S^1 (with one zero cell and one one-cell) and attach a two cell by sending S^1 to one interior point of the one-cell). Then the star of the zero cell would be S^1, which is not open.
S Mar 13 at 13:31 review First questions
Mar 13 at 14:26
S Mar 13 at 13:31 history asked brattok CC BY-SA 4.0