User Portlet
| Discussions |
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| In an attempt to speed up Mathematica's PseudoInverse function, I wonder if helping it zero out small numbers would work. With cubic scaling for CPU time and quadratic scaling for memory, I don't know that this will help much but I would like to... |
| I am just getting started with Raspberry Pi. Am I seeing boards that require a desktop or are you suppose to use enclosures? |
| Who would you credit for discovering the SVD method? Who would have first coded SVD? Does 1984 Waterloo ring a bell? (That was the indirect origin of my first copy on reel to reel in C, but I do not know who wrote it.) |
| Please execute: alpha = 4; word = 3; dict = Partition[Flatten[Tuples[IdentityMatrix[alpha], word]], (alpha*word)]; MatrixForm[dict] Do you see an easy way to get the PseudoInverse without using Mathematica's... |
| By "solution", I mean a PseudoInverse. By "exact", I mean a formula, not a fit (such as SVD) or a decomposition. |
| Given that your customers have a Mathematica license, is there a way to sell executable code to them without giving away your proprietary source code too? |
| (* complete dictionary of words, one per row, number of rows is (alpha^word), using words of length "word" and an alphabet of "alpha" number of characters *) alpha = 4; word = 3; dict =.; dict =... |
| Please try to stay simple so this can be understood by young students, age 10 -13. |
| Even after optimization, I might need a lot of computation time. Can anyone host me on a supercomputer running Mathematica? If so, could you compare your speed to an Intel i7 with 16 gigs of RAM? I believe I am CPU limited but not memory limited. |
| The Lorentz equation is a good example. I've always thought the use of that factor in time dilation should use speed rather than velocity. Once, while reading about "turn-around effects", I actually looked at the date on the journal to see if it... |