Timeline for Exponential of large matrices
Current License: CC BY-SA 3.0
26 events
| when toggle format | what | by | license | comment | |
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| S Feb 3, 2017 at 3:04 | history | suggested | Rodrigo de Azevedo |
added tags
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| Feb 3, 2017 at 2:00 | review | Suggested edits | |||
| S Feb 3, 2017 at 3:04 | |||||
| Feb 3, 2017 at 0:44 | answer | added | Stanley Bak | timeline score: 2 | |
| Dec 22, 2013 at 18:08 | answer | added | Terry Loring | timeline score: 2 | |
| Dec 17, 2013 at 18:27 | answer | added | Sijo Joseph | timeline score: 5 | |
| Sep 25, 2013 at 22:54 | history | edited | François G. Dorais | CC BY-SA 3.0 |
appended answer 26323 as supplemental
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| Sep 6, 2013 at 12:40 | answer | added | Oliver | timeline score: 3 | |
| Jun 23, 2011 at 5:26 | comment | added | Nilima Nigam | Xodarap, why are you exponentiating this matrix, and where does the problem come from? In other words, do you want the object $(e^A)$, or are you interested in computing its action on a given vector? These are (at the numerical linear algebra level) somewhat different questions. I'll be happy to point you to some references if you specify what you're trying to do. | |
| Jun 23, 2011 at 5:24 | answer | added | Nilima Nigam | timeline score: 5 | |
| Jun 22, 2011 at 16:48 | answer | added | Federico Poloni | timeline score: 10 | |
| Jun 22, 2011 at 5:24 | answer | added | Glynne | timeline score: 11 | |
| Aug 12, 2010 at 22:13 | vote | accept | Xodarap | ||
| Jan 29, 2012 at 17:26 | |||||
| May 30, 2010 at 20:54 | vote | accept | Xodarap | ||
| May 30, 2010 at 20:55 | |||||
| May 29, 2010 at 17:58 | answer | added | Chris Godsil | timeline score: 8 | |
| May 28, 2010 at 20:40 | comment | added | Steve Huntsman | In MATLAB you'll want to sparsify explicitly if you haven't already; the "sparse" command does this. Then use "eigs" (not "eig") to return the eigenvectors. Do what everyone else is saying (if your matrix is really that sparse, MATLAB should be up to it on a modern laptop) and then compare the results you obtain with "expm" (if you can). I'd be surprised if the calculation took more than a few minutes. | |
| May 28, 2010 at 19:18 | comment | added | Nate Eldredge | Are you looking for an exact result, or a numerical approximation? If the latter, look at the facilities available in Matlab or Octave or your favorite scientific computation package. This should certainly be provided. (At the very least, you will be able to diagonalize the matrix, probably faster than you think.) | |
| May 28, 2010 at 17:24 | comment | added | Xodarap | @Mariano: I changed this to be "exponential" - is this what you meant? | |
| May 28, 2010 at 16:28 | comment | added | Robin Chapman | You might consult Nick Higham's book Matrix functions: books.google.co.uk/… | |
| May 28, 2010 at 15:20 | answer | added | John D. Cook | timeline score: 2 | |
| May 28, 2010 at 15:19 | history | edited | Xodarap | CC BY-SA 2.5 |
s/exponent/exponential/
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| May 28, 2010 at 14:47 | history | edited | j.c. |
edited tags
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| May 28, 2010 at 14:47 | comment | added | j.c. | The two links posted so far are identical. | |
| May 28, 2010 at 14:26 | comment | added | Guy Katriel | You might find this article of interest cs.cornell.edu/cv/ResearchPDF/19ways+.pdf | |
| May 28, 2010 at 14:04 | comment | added | Mariano Suárez-Álvarez | Can you fix the title? You did not mean "exponent"... | |
| May 28, 2010 at 14:02 | comment | added | Steve Huntsman | docs.google.com/… | |
| May 28, 2010 at 13:18 | history | asked | Xodarap | CC BY-SA 2.5 |