Timeline for Find $a$ satisfying $x \cup_1 y = \delta a$ when $x,y \in Z^2(G,\mathbb{Z}_2)$
Current License: CC BY-SA 4.0
7 events
when toggle format | what | by | license | comment | |
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Sep 10, 2020 at 8:33 | history | edited | YCor | CC BY-SA 4.0 |
slightly expanded title (and put math 'a')
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Sep 10, 2020 at 6:45 | history | edited | YCor |
edited tags
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Sep 10, 2020 at 6:12 | answer | added | Achim Krause | timeline score: 3 | |
Sep 10, 2020 at 4:49 | comment | added | A_Physicist. | @QiaochuYuan I added an explicit expression. You are right, the cup product of two 2-cocycles is a 4-cocycle. The $\cup_1$ product of two 2-cocycles is a 3-cochain. | |
Sep 10, 2020 at 4:47 | history | edited | A_Physicist. | CC BY-SA 4.0 |
added 137 characters in body
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Sep 10, 2020 at 3:11 | comment | added | Qiaochu Yuan | What is $\cup_1$ here? Is it the cup product? Isn't the cup product of two $2$-cocycles a $4$-cocycle? | |
Sep 9, 2020 at 23:25 | history | asked | A_Physicist. | CC BY-SA 4.0 |