Timeline for Can we add two matrices by performing an operation on their eigenvalues & eigenvectors?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| S Dec 4, 2017 at 8:17 | history | suggested | jeq | CC BY-SA 3.0 |
Copied images to imgur.com, as they were not being displayed because of broken links. Added links to original image sources via Wayback Machine.
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| Dec 4, 2017 at 1:18 | review | Suggested edits | |||
| S Dec 4, 2017 at 8:17 | |||||
| Sep 24, 2010 at 10:07 | history | edited | Bill Thurston | CC BY-SA 2.5 |
Inserted mention of Dave Speyer's comment
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| Sep 17, 2010 at 6:10 | comment | added | Bill Thurston | Thanks! I just noticed your comment. The question had continued to nag me, and I've been waiting for a comprehensible answer to fall out of the sky. Thanks, sky! I'm wondering also whether the determinant picture will help clarify the geometry of ratonal functions. | |
| Sep 14, 2010 at 21:21 | comment | added | David E Speyer | "I believe this can be any homogeneous polynomial P( x,y,z) of degree n in 3 variables subject to the condition P(1,0,0)=(the determinant of the identity) = 1." Yes, this is true. If the curve $P=0$ is smooth, then the space of such representations is $J \setminus \Theta$, where $J$ is the Jacobian of the curve and $\Theta$ the $\Theta$ divisor. See Vinnikov, "Complete description of determinantal representations of smooth irreducible curves", Linear Algebra Appl. 125 (1989), 103--140 | |
| Sep 14, 2010 at 20:47 | comment | added | darij grinberg | +1 for abstract art. | |
| Sep 14, 2010 at 20:34 | history | edited | Bill Thurston | CC BY-SA 2.5 |
typo
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| Sep 13, 2010 at 0:12 | history | edited | Bill Thurston | CC BY-SA 2.5 |
added 454 characters in body
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| Sep 11, 2010 at 23:19 | history | edited | Bill Thurston | CC BY-SA 2.5 |
corrected a 2-variable->3-variable, minor changes.
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| Sep 11, 2010 at 18:36 | comment | added | Bill Thurston | Thanks, I edited to eliminate this term -- I was confused about the terminology. | |
| Sep 11, 2010 at 18:35 | history | edited | Bill Thurston | CC BY-SA 2.5 |
eliminated confused usage of "singualr values".; added 5 characters in body
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| Sep 11, 2010 at 18:17 | comment | added | darij grinberg | "singular values = roots of the characteristic polynomial". I DON'T think this is the standard meaning of the word "singular values". | |
| Sep 11, 2010 at 18:05 | vote | accept | Edward | ||
| Sep 11, 2010 at 17:56 | history | answered | Bill Thurston | CC BY-SA 2.5 |