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| bio | website | tpfto.wordpress.com |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 4 months |
| seen | 2 hours ago | |
| stats | profile views | 3,220 |
Avatar made with Mathematica 8:
Blocky depiction of Hilbert curve, styled with Perlin noise.
E-mail (flipped ROT13): zqd˙ʎʌuzʇ@ʇɐʌǝɥʇʌssqɹǝɥɟuɹʎɔ
Any code I've posted here I place under the WTFPL.
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May 17 |
revised |
How to compare power towers in Mathematica? added 4 characters in body |
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May 17 |
comment |
Dt acting on symbolic notational forms ...but you are differentiating with respect to what? Anyway, have a look at the Constants option of Dt[]. |
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May 17 |
comment |
Adding custom GridLines to the “automatic” ones It might be more useful to use Scaled[] for offsetting in the vertical direction. If you use Epilog -> {Directive[Thick, Magenta], Line[{Scaled[{0, -1}, {{2010, 1, 15}, 0}], Scaled[{0, 1}, {{2010, 1, 15}, 0}]}]}, you'll find that even if you change the PlotRange, the vertical magenta line will always hit the horizontal boundaries. |
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May 17 |
comment |
Adding custom GridLines to the “automatic” ones At worst, one could fall back on Epilog and manually add markers for "special" dates (that is, explicitly construct a vertical Line[]). |
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May 17 |
revised |
Finding Limits in several variables deleted 6 characters in body |
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May 17 |
revised |
How can I get the solution of complicated implicit function? edited tags |
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May 17 |
comment |
Can you form a list with elements which are terms from an equation? Huh, I can't seem to see an == sign anywhere. Where's the "equation"? |
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May 17 |
revised |
How to expand a function into a power series with negative powers? edited tags |
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May 17 |
revised |
Can DSolve solve systems with unspecified function coefficients? deleted 32 characters in body; edited title |
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May 17 |
comment |
Solving an ODE in power series @Mark, after playing with some of those functions for a while, I'm not sure if using them is any better than forming a DifferentialRoot[] and then using Series[] for expansion (although I am sure those functions are used under the hood with what I'm proposing). |
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May 17 |
comment |
Efficient way to solve equal sums $x_1^k+x_2^k+\dots+x_5^k=y_1^k+y_2^k+\dots+y_5^k$ with Mathematica? OP is on version 4, so he won't have GatherBy[] handy. |
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May 17 |
comment |
How can I draw a polygon from a set of angles? You might be interested in the (undocumented) function Graphics`Mesh`SimplePolygonQ[] for checking self-intersections. You just need to give it a Polygon[] as an argument. |
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May 17 |
comment |
Efficient way to solve equal sums $x_1^k+x_2^k+\dots+x_5^k=y_1^k+y_2^k+\dots+y_5^k$ with Mathematica? @bel, yeah, my run of something similar to yours, but with bigger bounds, choked. Then again, I'm using a very low-powered box... |
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May 17 |
comment |
Solving an ODE in power series @Mark, I see. I had something like this in mind... still, if memory serves, the functions there can only do linear ODEs, not things like $y^\prime=1+y^2$. |
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May 17 |
comment |
Solving an ODE in power series Somewhat surprisingly, the procedure you want isn't built-in, but one could certainly write a routine for this task. |
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May 17 |
revised |
Solving an ODE in power series added 3 characters in body; edited title |
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May 17 |
revised |
Efficient way to solve equal sums $x_1^k+x_2^k+\dots+x_5^k=y_1^k+y_2^k+\dots+y_5^k$ with Mathematica? edited tags |
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May 17 |
comment |
Does setting FindMinimum constraints improve efficiency? @Oleksandr, I was comparing the task of optimization in one and three dimensions. It's easier to chase the squirrel in the narrow road (one dimension), while the additional degrees of freedom in the three-dimensional case makes chasing a flying bat harder. Things get worse with each added dimension (the curse of dimensionality). |
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May 17 |
revised |
Efficient way to solve equal sums $x_1^k+x_2^k+\dots+x_5^k=y_1^k+y_2^k+\dots+y_5^k$ with Mathematica? edited tags |
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May 17 |
comment |
Efficient way to solve equal sums $x_1^k+x_2^k+\dots+x_5^k=y_1^k+y_2^k+\dots+y_5^k$ with Mathematica? Oh, well let's tag it appropriately... :) (I used version 5 for a long while before upgrading to 8 myself.) |
