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Created on 2016-10-25 14:57 by Jáchym Barvínek, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Messages (4) | |||
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| msg279410 - (view) | Author: Jáchym Barvínek (Jáchym Barvínek) | Date: 2016-10-25 14:57 | |
0 ** 0 is mathematically undefined and equivalent to 0/0. 0/0 correctly raises ZeroDivisionError, but 0 ** 0 == 1. Also 0.0 ** 0 == 0 ** 0.0 == 0.0 ** 0.0 == 0.0. Similarly for math.pow. |
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| msg279411 - (view) | Author: Jáchym Barvínek (Jáchym Barvínek) | Date: 2016-10-25 14:58 | |
Sorry, It should be 0.0 ** 0 == 0 ** 0.0 == 0.0 ** 0.0 == 1.0 of course. |
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| msg279413 - (view) | Author: Tim Peters (tim.peters) *  |
Date: 2016-10-25 15:18 | |
This won't be changed - it's a near-universally mandated behavior across relevant standards. Many years ago it wasn't, but Knuth changed minds when he wrote: """ We must define x^0=1 for all x, if the binomial theorem is to be valid when x=0 , y=0 , and/or x=-y . The theorem is too important to be arbitrarily restricted! """ More here: https://www.quora.com/Why-does-Python-return-1-for-pow-0-0-which-is-mathematically-wrong |
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| msg279443 - (view) | Author: Mark Dickinson (mark.dickinson) * |
Date: 2016-10-25 18:36 | |
Also, https://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_power_of_zero |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:38 | admin | set | github: 72715 |
| 2016-10-25 18:36:19 | mark.dickinson | set | nosy:
+ mark.dickinson messages: + msg279443 |
| 2016-10-25 15:18:41 | tim.peters | set | status: open -> closed type: behavior nosy: + tim.peters messages: + msg279413 resolution: not a bug stage: resolved |
| 2016-10-25 14:58:42 | Jáchym Barvínek | set | messages: + msg279411 |
| 2016-10-25 14:57:20 | Jáchym Barvínek | create | |