Timeline for What is the product of two categories? Or its substitute ? [closed]
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
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| Feb 17, 2012 at 16:53 | history | closed |
Martin Brandenburg Dan Petersen Neil Strickland Qiaochu Yuan Tom Leinster |
too localized | |
| Feb 17, 2012 at 15:13 | history | edited | David White | CC BY-SA 3.0 |
There were a ton of typos. I fixed all I could find
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| Feb 17, 2012 at 14:04 | comment | added | Niemi | Virtually every introduction to category theory will answer your question. In fact, for two categories $\mathcal{A}$, $\mathcal{B}$ there is always a product category $\mathcal{A} \times \mathcal{B}$ and its definition is as straightforward as it can possibly be. Wikipedia and nLab also know the answer: en.wikipedia.org/wiki/Product_category ncatlab.org/nlab/show/product+category – Sebastian K. 0 secs ago | |
| Feb 17, 2012 at 13:59 | vote | accept | PULITA ANDREA | ||
| Feb 17, 2012 at 13:43 | comment | added | Martin Brandenburg | I've deleted the inappropriate tags (logic, set-theory, higher-category-theory). | |
| Feb 17, 2012 at 13:43 | history | edited | Martin Brandenburg |
edited tags
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| Feb 17, 2012 at 13:42 | comment | added | Martin Brandenburg | Please read a) the FAQ of mathoverflow, b) any introduction to category theory. | |
| Feb 17, 2012 at 13:42 | comment | added | Buschi Sergio | GIve a set $X$ you have that $X\times \emptyset=\emptyset$ (may be you get a mistake considering $X\times \{*\}=X$ | |
| Feb 17, 2012 at 13:41 | answer | added | Kay Werndli | timeline score: 1 | |
| Feb 17, 2012 at 13:34 | history | asked | PULITA ANDREA | CC BY-SA 3.0 |