# All Questions

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### Good Introduction / Tutorial to Mathematica **Books** [duplicate]

Possible Duplicate: Where can I find examples of good Mathematica programming practice? I'm a high school senior and am using Mathematica for a research project. However, I find it a bit slow to ...
412 views

### Lagrange multipliers code runs forever

I am writing a code for a Lagrange multipliers problem with three variables. My code looks like this: ...
158 views

### How to exchange interpolating function results of NDSolve between different platforms?

For example, I have a interpolating function solution by NDSolve in a windows x64 platform and want to share the result to users in other windows x86. I tried the DumpSave and ".mx" binary format, ...
49 views

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### Strange behavior of Plot over a domain containing very large x-values

When I plot a function of (1 + 1/n)^n,There you can see: Plot[{(1 + 1/n)^n, E}, {n, 1, 10^13}] When I add a option of ...
145 views

### NIntegrate failling on floating value

I'm trying to take the following integral NIntegrate[ ((Sin[Q 1]-Q 1*Cos[Q 1])/(Q 1)^3)^2 * S[Q,0.4,2] * Q BesselJ[0,0.5Q] , {Q,0,Infinity}] ...
204 views

### Simplify closed formula for distance-preserving great circle spherical coordinate parametrization

Short version: can the function paramLonLat defined below be simplified given the conditions conds below? Note that the return ...
46 views

### Possible bug of Exporting as HTMLFragment at Linux

This is the result of Mathematica 10.0.2 of Linux Version. There are two style inside one tag, and this fragment cannot be Imported as XML by Mathematica. This is the result of Mathematica 10.1 of ...
52 views

### Applying a function to the second element of a list [duplicate]

I'm trying to apply a simple function to the second element of a list: {#1, #2/5} &@{1, 2} But this returns an error message. ...
61 views

### Numerically integrating a highly oscillatory multi-dimensional Bessel function with good precision

This is a follow up question to Numerically integrating a highly oscillatory Bessel function with good precision. Now I am considering a three dimensional integral, ...
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### Create Table where each line is a function of the line before [duplicate]

I've been noodling around with primitive Pythagorean triples. One of the 'branches' of the ternary tree that generates all possible PPTs from the initial parent PPT ...
112 views

### How to solve 2D PDE with a constraint?

As related to the 2D+1 PDE problem, if now I would like to solve the stationary solution which satisfies $\partial_t u(t,x,y)=0$. Or equivalently, \$-y\partial_{x}u+\partial_{y}\left[a y+b sin(x)u+...
312 views

Observe that ...
43 views

### customisable error checking, message handling code

I have an iterated computation running in a while loop, which is bound to fail at some point, at which point I want it to stop, e.g. ...
377 views

### Output of matrix in FortranForm

matr2 = Table[FortranForm[matr[[i, j]]], {i, 4}, {j, 6}] but i want output to be more like this matrix(1,1)=a11 output in ...
550 views

### How can I fit a differential equation to experimental data?

I would like to add a fit to the following data. Here is the differential equation I am using. g=9.81 l=0.2 m=0.09 ...
129 views

### Custom Ticks for Image3D?

Is it possible to make user-defined ticks in an Image3D? (Wizardly solutions will be appreciated, too.) With ...