Timeline for Can $y^2-4$ be a divisor of $x^3-x^2-2 x+1$?
Current License: CC BY-SA 4.0
7 events
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| Mar 18, 2022 at 17:01 | comment | added | Bogdan Grechuk | I am sorry, can you please explain why the prime divisor $q$ of $p_a(n)$ must be congruent to a cubic residue modulo $P$? I looked at Shank's paper and this is stated without detailed proof, with just one intermediate step that $q^{(P-1)/3}$ is $1$ mod $P$, which I also do not know why. Am I missing something obvious? | |
| Mar 9, 2022 at 23:40 | vote | accept | Bogdan Grechuk | ||
| Mar 9, 2022 at 22:43 | answer | added | Noam D. Elkies | timeline score: 30 | |
| Mar 9, 2022 at 22:30 | comment | added | Bogdan Grechuk | This is the simplest non-trivial example of my earlier question mathoverflow.net/questions/404703/… . I have added this to the question. | |
| Mar 9, 2022 at 22:29 | history | edited | Bogdan Grechuk | CC BY-SA 4.0 |
Motivation added
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| Mar 9, 2022 at 20:59 | history | edited | Bogdan Grechuk | CC BY-SA 4.0 |
edited title
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| Mar 9, 2022 at 20:31 | history | asked | Bogdan Grechuk | CC BY-SA 4.0 |