Timeline for Square root of a 2 by 2 matrix using MatrixPower[]
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Aug 5, 2021 at 0:27 | answer | added | theorist | timeline score: 5 | |
| Feb 8, 2021 at 18:00 | history | tweeted | twitter.com/StackMma/status/1358838018480762881 | ||
| Feb 1, 2021 at 19:39 | history | became hot network question | |||
| Feb 1, 2021 at 13:57 | comment | added | Daniel Lichtblau |
I would be aghast if MatrixPower returned anything other than a matrix; any other behavior would make it useless. So that "limitation" is both by design and utterly necessary.
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| Feb 1, 2021 at 12:10 | vote | accept | Crypto | ||
| Feb 1, 2021 at 11:44 | answer | added | J. M.'s missing motivation♦ | timeline score: 17 | |
| Feb 1, 2021 at 11:41 | comment | added | Roman |
To put J.M.'s comment in other words, Sqrt[4] also only gives us one solution ($+2$) even though there are two ($+2$ and $-2$) available.
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| Feb 1, 2021 at 11:39 | comment | added | J. M.'s missing motivation♦ |
By convention, when things like Power[] or MatrixPower[] are evaluated, only the principal root is taken.
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| Feb 1, 2021 at 11:38 | history | edited | J. M.'s missing motivation♦ |
edited tags
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| Feb 1, 2021 at 11:38 | history | edited | Henrik Schumacher | CC BY-SA 4.0 |
edited body
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| Feb 1, 2021 at 11:29 | history | asked | Crypto | CC BY-SA 4.0 |