network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 3 months |
| seen | Sep 29 '12 at 20:51 | |
| stats | profile views | 12 |
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Feb 18 |
comment |
Symbolic Optimisation excellent thanks |
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Feb 18 |
accepted | Symbolic Optimisation |
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Feb 18 |
awarded | Supporter |
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Feb 18 |
asked | Symbolic Optimisation |
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Feb 9 |
comment |
Obtaining the square-root of a general positive definite matrix Thanks - reducing it to a nearly-symmetric matrix solves the speed problem. One could use RootReduce[] as a hack too. |
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Feb 9 |
awarded | Scholar |
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Feb 9 |
accepted | Obtaining the square-root of a general positive definite matrix |
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Feb 9 |
comment |
Obtaining the square-root of a general positive definite matrix sorry, that was unclear. I have edited and simplified the question (hopefully what I'm trying to achieve is clear now). Basically, I have a horrible square root to find , which will exist, but I don't actually need to know the analytical result, just which entries in the solution matrix will be different from zero. |
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Feb 9 |
awarded | Editor |
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Feb 9 |
revised |
Obtaining the square-root of a general positive definite matrix deleted 195 characters in body |
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Feb 8 |
comment |
Obtaining the square-root of a general positive definite matrix Is there a mapping rule I can use to test this? |
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Feb 8 |
awarded | Student |
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Feb 8 |
comment |
Obtaining the square-root of a general positive definite matrix Hi guys, this was my post originally but I lost my account name form yesterday. The matrix comes from the solution to a algebraic ricatti equation. Now, I know F is positive semi definite since it comes from some transition and diffusion matrices in a statespace representation. Obviously this is going to be an ugly output, but thinking about it , I only need to know which elements of the solution are different from zero. |
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Feb 7 |
asked | Obtaining the square-root of a general positive definite matrix |
