Mathematica

Graph Theory - Pathset and Cutset determination
I've been playing with Mathematica's GraphUtilities` and Combinatorica` packages and wonder whether they can help me tackle the problem of calculating the minimal pathsets and minimal cutsets for a graph network. In my case, there's more than one minimal pathset/cutset and I need to identify them all. There seem to... 8 Apr 2010 08:21

proper supremum norm implementation
Hi, I am trying to calculate an approximation to the supremum norm of the difference of two functions on the interval [a,b]. The first one is a linear spline (lets call it spline, too) connecting data points pretty much lying on the graph of the second function (lets call it optf), which in my case is a piecew... 8 Apr 2010 08:21

Inverse Laplace Transform
Hi, I need to find an inverse Laplace transform of the expression: Sqrt[s*(s+a)]/(s-b) where "s" is the Laplace variable, "a" is a real positive constant, and "b" is a real constant that can be either positive or negative. I have tried the InverseLaplaceTransform[] function, but it returns the original e... 8 Apr 2010 08:21

Different results with ReplaceAll and direct substitution
Hi all. A vector function of one variable, defined as follows, Y=expA[z].(Y0+Integrate[expA[-s].b[s],{s,0,z}]) give me different results if I use ReplaceAll instead of writing directly the value of z: Y /. z -> 0 Out[41]= {0.207031, 0.408203, 0.50293, 0.40625, 0.206543, 0., -0.00195313, 0.00195313, 0., 0... 8 Apr 2010 08:21

Pattern to match a list of non-negative integers
This seems like a very basic pattern-matching question, but somehow the answer eludes me at the moment. I want to match a list of non-negative integers. Something like MatchQ[{1,2},{(x_Integer /; x = 0)..}] doesn't work -- do named patterns simply not play well with Repeated[]?.. After starting to write this ... 10 Apr 2010 06:56

Show a maximum curve in ListContourPlot
Dear all, I'm trying to make visible in a ListContourPlot for a function, a maximum value for it. The thing is that the Max of this function is very specific (Log[2]) and I need that my readers can follow the "movement" of this maximum, although i want them to have the rest of the contour. Is this possible withi... 9 Apr 2010 04:31

Simplifying multiple expressions
A question arising out of laziness. I have about 20 expressions that I want to simplify using the same set of assumptions. Is there an easy method for this ? ... 8 Apr 2010 08:21

Integration error
Hello all, I'm getting a strange result when calculating what I thought was a relatively straightforward integral. If I evaluate the following expression, I receive an imaginary result when it should, in fact, equal 1. (This happens in Mathematica 7.0.1 on Mac OS X): In[1]:= Integrate[( 4 (8/(2320 + 3 x (-96 +... 7 Apr 2010 07:50

Mathematica Programming
I have Mathematica 7 but I was wondering how it compares to WebMathematica and WorkBench? Can I create full applications and interactive websites with Mathematica? How much control do I have over the user interface design? ... 10 Apr 2010 06:56

Fix for "INTERNAL SELF-TEST ERROR: MacFont|c|818"
Ever since I upgraded to OS X's Snow Leopard, I have been receiving these messages on Mathematica startup, INTERNAL SELF-TEST ERROR: MacFont|c|558 Click here to find out if this problem is known, and to help improve Mathematica by reporting it to Wolfram Research. INTERNAL SELF-TEST ERROR: MacFont|c|8... 6 Apr 2010 07:28