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# Questions

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### When is an acylic chain complex contractible

jul 25 at 5:56 Mark Grant 9,06111333

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### Image of J in the classical Adams Spectral Sequence

sep 3 at 19:50 Christian Nassau 88737

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### Differentials in the Adams Spectral Sequence for spheres p=2

jul 16 at 1:05 Peter May 12.1k13854

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### Universal Property of the Smash Product (of pointed spaces)

aug 29 at 13:39 Peter May 12.1k13854

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### Why are cup-i products and Steenrod Squares often (always?) unary?

aug 11 at 14:42 Peter May 12.1k13854

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### what do empty parens symbol mean?

aug 17 at 6:07 David Roberts 11.7k21855

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### How do you know when something must die in the Adams Spectral Sequence for $\pi_*^s$

jul 7 at 4:42 Tyler Lawson 18.7k24490

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### Computing Slim Extensions representing Ext

nov 26 at 18:11 Joseph Victor 5556

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### Is there a picture I should have in my head of rational homotopy equivalence?

apr 17 at 19:37 Joseph Victor 5556

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