meta user
network profile
| bio | website | |
|---|---|---|
| location | China | |
| age | ||
| visits | member for | 9 months |
| seen | 59 mins ago | |
| stats | profile views | 134 |
|
Nov 8 |
comment |
GeneralMiniMaxApproximation - Dividing out the zero @aukie Hopefully I too can follow in your footsteps soon and get one or two Nice Question bronze XD. |
|
Nov 8 |
comment |
FindRoot errors Does this question somewhat help you? |
|
Nov 8 |
comment |
GeneralMiniMaxApproximation - Dividing out the zero Try GeneralMiniMaxApproximation[{ArcCos[t - 1],
t}, {t, {Cos[2] + 1, Cos[1] + 1}, 2, 3}, x] |
|
Nov 5 |
comment |
How do I solve coupled ordinary differential equations? If $a=x'[t]$ then $a'=x''[t]$… have you checked the document for the syntax of NDSolve? : reference.wolfram.com/mathematica/ref/… |
|
Nov 5 |
comment |
How do I solve coupled ordinary differential equations? I think if $a=x'[t]$ then $a'=x''[t]$… and does c1x[t] lack a blank after c1? Your equation seems to be pretty normal, what difficulty do you have in solving them with NDSolve? I suggest you to give a more specific sample. |
|
Nov 4 |
comment |
How to solve the liar problem? @halirutan Of course I`ve read it :) and with those examples in the document, what puzzles me is why the last sample didn't work while the first one seems……………OH!!! I understand, I'll edit my question again, wait for a moment. |
|
Nov 4 |
comment |
How to solve the liar problem? Well…in fact I've already tried SatisfiabilityInstances but failed, because I didn't notice that we can combine equations with either && or {} in Solve and Reduce while only && is available for SatisfiabilityInstances囧. Also, I notice the mistake in my original analysis, see my edit of the question for more details. |
|
Nov 4 |
comment |
How to solve the liar problem? @DanielLichtblau Er…what does Z_2 mean? |
|
Nov 3 |
comment |
How to solve the liar problem? @RahulNarain Hehe, I'm unfamiliar with them, too. In fact it's the first time I use Refine and Implies in my code. |
|
Nov 2 |
comment |
How can I find the vertexes of a Polygon? You mean you want to "see" the coordinates of the vertexes from the polygon myGraphics? If so, try InputForm@myGraphics. |
|
Nov 1 |
comment |
Bad function evaluation Hey… Subscript[a, i]*(x)^i apparently contains 0^0 when x=0, i=0. |
|
Oct 30 |
comment |
The only usage for the option InterpolationOrder in NDSolve is to be set to All? And here hides another example for InterpolationOrder in NDSolve 囧. |
|
Oct 29 |
comment |
Problem with NDsolve for a system of equations I can't agree more… |
|
Oct 29 |
comment |
Problem with NDsolve for a system of equations Oh, that's true…I should have read the help more carefully. |
|
Oct 29 |
comment |
Problem with NDsolve for a system of equations Er…why not add some explain for the select of the coefficients? |
|
Oct 15 |
comment |
How to plot a quarter of circle using Mathematica? You mean you don't want to use ParametricPlot? |
|
Oct 14 |
comment |
'not a valid variable' error when trying to solve 13 equations with 13 variables Well, I'm not familiar with this method…I add the Thread[vars > 0] and try Reduce but my PC with 2GB memory seems unable to finish the calculation…do you have a smaller range for the variables? BTW, what's the context of the equation? It has a physics meaning or something, right? |
|
Oct 14 |
comment |
'not a valid variable' error when trying to solve 13 equations with 13 variables So your target isn't just to solve the set of equations? |
|
Oct 13 |
comment |
'not a valid variable' error when trying to solve 13 equations with 13 variables ……Then what's NMinimize used for? |
|
Oct 13 |
comment |
'not a valid variable' error when trying to solve 13 equations with 13 variables Er…where's the definition of vars and eqn? What's the list at the end of your new code used for? |
