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seen Nov 30 '13 at 16:49

Jul
2
awarded  Curious
Oct
21
awarded  Scholar
Oct
21
accepted Derivation of weak form for variational problem
Oct
10
answered How to solve this Reaction-Diffusion problem by FEM?
Oct
8
awarded  Yearling
May
15
asked Reference request: Finite difference methods on curvilinear (body fitted) grids
Apr
25
answered Transpose of matrix inverse: $(AA^T)^{-1}A^Tb \stackrel{?}{=} (A^TA)^{-1}A^Tb$
Apr
25
answered Derivative of matrix inner product
Mar
6
comment Construction of a system differential equation from the projected 2D solution curves
I believe this problem may not have a unique solution. If you consider the curve to be given as X(t), Y(t), Z(t) where t \in (0,1) and a continuous monotonously increasing function f so that f(0) = 0, and f(1) = 1 then X(f(t)), Y(f(t)), Z(f(t)) will as well be a solution to your problem.
Mar
6
comment derivative of a function using cosine transform
With the Fourier transform the function does not have to be periodic, that requirement is only given for the Fourier series approximation for a function.
Mar
1
answered How to create a transition matrix that will guarantee an outcome after infinite transitions
Feb
26
answered MATLAB software for graph theory
Feb
25
asked Derivation of weak form for variational problem
Nov
27
awarded  Tumbleweed
Nov
20
asked Harmonic functions and conformal mappings
Nov
20
comment Find expotential function from two points
I believe the generic solution is to take the base b logarithm of the equations that yields a linear regression problem, a and b can be found from the solution. en.wikipedia.org/wiki/Nonlinear_regression
Nov
19
asked Orthogonal vs general curvilinear coordinates
Nov
17
comment How to prove that such a function is linear?
The LHS is the absolute value of the forward estimate of the 2nd derivative of f at x. (en.wikipedia.org/wiki/Finite_difference) If the 2nd derivative is zero for all values of x in (a,b) then the function has to be of the form $$C_1x+C_2$$
Nov
16
answered Plotting an integral of a function in Octave
Nov
5
answered Illumination problem with one light ray