Timeline for Divisibility question while enumerating endomorphisms: PART 1
Current License: CC BY-SA 4.0
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| Dec 28, 2020 at 15:09 | history | edited | T. Amdeberhan | CC BY-SA 4.0 |
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| Dec 27, 2020 at 16:42 | comment | added | darij grinberg | Yes, it is. See Exercise 1 (c) in my UMN Fall 2017 Math 4990 homework set #6. The proof is a simple application of the absorption formula $m \dbinom{n}{m} = n \dbinom{n-1}{m-1}$. If I am not mistaken, it is easy to make this a bijective proof. | |
| Dec 27, 2020 at 16:17 | history | asked | T. Amdeberhan | CC BY-SA 4.0 |