Timeline for Mistakes in Bredon's book "Topology and Geometry"?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 4, 2019 at 10:54 | vote | accept | Francesco Polizzi | ||
| S Jan 26, 2019 at 8:40 | history | suggested | CommunityBot | CC BY-SA 4.0 |
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| Jan 26, 2019 at 7:20 | review | Suggested edits | |||
| S Jan 26, 2019 at 8:40 | |||||
| Jan 25, 2019 at 18:55 | comment | added | Francesco Polizzi | Yes, but again: the book is 550 pages long, one that is just interested in one topic cannot read carefully all of it. Since at page 158 Bredon uses $*$ to indicated to free product, I supposed (maybe ingenuously) that this notation would have been kept in all the book, even because I never met the notation $*$ for $\mathrm{Tor}_1$ before. | |
| Jan 25, 2019 at 17:31 | comment | added | Nicholas Kuhn | Bredon carefully defines A*B on page 278 in a section called More homological algebra and even says that it is often denoted Tor(A,B). | |
| Jan 25, 2019 at 12:22 | comment | added | Denis Nardin | @FrancescoPolizzi I'm allegedly a specialist in Algebraic Topology, and I didn't know either, so don't feel too bad :) | |
| Jan 25, 2019 at 8:29 | comment | added | Francesco Polizzi | I'm not a specialist in Algebraic Topology, and my background on these basic topics is mainly from Massey's and Hatcher's books, where I never found this notation for $\mathrm{Tor}_1$ (at least, as far as I can remember). I am actually quite surprised that it seems to be rather common in older textbooks. | |
| Jan 25, 2019 at 5:00 | comment | added | Greg Friedman | And Munkres!... | |
| Jan 24, 2019 at 13:51 | comment | added | Pedro | (This notation is also used in Spanier's text, for example.) | |
| Jan 24, 2019 at 13:34 | comment | added | Francesco Polizzi | Thanks. I was not aware of this (old) notation. | |
| Jan 24, 2019 at 13:04 | history | answered | Denis T | CC BY-SA 4.0 |