Math Forum / Math Software / Mathematica / February 2010

Hi Group,
suppose you wanna to display an alert to the user before to continue the
execution of your code when some conditions occur : probably you'll use
ChoiceDialog[], the useful function that "puts up a standard choice

I'm having trouble using parametrized assumptions consistently.  I have
two objects, q and r, both having a label and an index.  Now, I want
that the following holds for any label L:
  q[L, 0]^2 - q[L, 1]^2 == 1

I have 15 lists with semi-descriptive names.  I want to make a
function that builds a plot (histogram, actually) that has the
particular list name as a label.
Something like this:

    How can I set the window dimensions and location using
WindowSize and WindowMargin in my init.m file?  I must be using the
wrong syntax because no matter what dimensions I enter the Untitled-1
window opens with the same size and location.

I want to define
f[x_]=a x^2
and after
g[a_,f_]= 2a+f

Can anyone suggest an elegant way to apply a function - in this case a
Style - to elements in a list.
In the example below I'm applying colours to their names.  (I don't
know how Text is being used so I aimed to preserve the original

I need a way to control the real memory usage by MathKernel for
preventing swapping on my machine. I am totally disappointed
MemoryConstrained[] (sometimes it works, sometimes fails).
I have not used JLink before and know nothing on Java language but

hi  i have an objective function with constraints as below
(c0^2+c1^2+c2^2)(0.0765)+0.0916(c0*c1)-0.0916(c1*c2)-0.021(c0*c2)
subject to
(c0^2+c1^2+c2^c3)=1

Mathematica 6, xpwindows
Grid[{{PDF[NormalDistribution[\[Mu], \[Sigma]], x], ",",
   "-\[Infinity]<x<\[Infinity]"}},
 ItemStyle ->

I have been trying to enter the PDE you can see in the picture at:
http://i50.tinypic.com/2rqmx4g.jpg
but I have had absolutely 0 luck. I am trying to solve the eqn into the
form: f(r) = C (aka, solve it for C). Can anyone help me?

i have the following problem:
i have two functions: f[Q] and x[Q] and i want f[x]. i cant invert
x[Q], so i do this like this:
fx=Interpolation[Table[{x[Q],f[Q]},{Q,0,10,0.1}]]

I have a nested list with the following dimensions:  {3,2,2}
It looks something like this:
list1 =
{

hello guy,
I just updated to fedora 12 x86_64. and reinstalled mathematica and say
'yes' when aske to modifie  SElinux, when I click the icon it is not
letting open mathematica recieving this message:

1) is there a way to add graphics to a 3d plot?
which is the best?
i use this piece of code to plot the module of a complex function.
Plot3D[Log[ Abs[f[x + I y]]], {x, -2, 2}, {y, -2, 4},

when you plot an unlimited function, mathematica chooses the vertical
range's limits. could i detect which are the limits chosen by
mathematica to use them? thanks
giuseppe