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12h
revised Integrate does not accept my integrand expression
added 60 characters in body
17h
comment Find lengths of contours in a ContourPlot
What is omega ?
1d
revised How to get integer/rational and real eigenvectors to be the same?
corrected minor typo
2d
revised complicated Numerical Integration, FEM application
corrected small typo
2d
comment complicated Numerical Integration, FEM application
It looks like all your 4-arguments dependencies are actually only on the differences; for instance, look at your B2. Reducing the number of dimensions might help.
Apr
16
awarded  Sportsmanship
Apr
16
comment Dsolve is not solving equation ( 3 system with 2.order diferantial equations)
Could you please say what was the syntax problem ? The code worded as it is for me.
Apr
16
answered Mathematica not recognising closed forms as specific values
Apr
16
comment Dsolve is not solving equation ( 3 system with 2.order diferantial equations)
Try restarting your kernel, your code looks fine.
Apr
16
revised Get Cos[2 x] in “Solve”
edited body
Apr
16
answered Get Cos[2 x] in “Solve”
Apr
15
comment How to make an equation to fit measured data
Have a look at FindFit, NonlinearModelFit and related functions in the docs (assuming your question is about using Mathematica).
Apr
14
comment DSolve failing to solve second-order ODE with two boundary conditons
Try restarting your kernel, I think your code is fine.
Apr
14
answered Multiple Linear Regression - obtaining equation with constant term
Apr
13
comment Imaginary number appears in Integrate
Try FullSimplify with the same assumptions.
Apr
11
answered Extract random points from a 3D manifold
Apr
10
comment Solving a pair of recurrence relations
If the equation for a[t] is decoupled from the rest, can't you solve it first and then use the solution in the equation for y[t] ?
Apr
9
comment Numerical solution of an ODE with a singularity at the initial value
You are not using Mathematica syntax (y(x) is not right). In order to use NDSolve you need your constants to have a numerical value.
Apr
8
comment Problems using hand-made transformation functions
Would FullSimplify[Gamma[z + 1]/Gamma[z]] help ?
Apr
7
revised Problem with Eigenvectors when given a matrix containing approximate numbers and symbols
added 34 characters in body