george2079
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 Mar 31 comment NDSolve and matrix formulation do not produce the same result. Why and which is more precise? @skrat. In case you missed the edit to my answer I got the matrix method to work (a1 converges to 0.00884556) Mar 31 revised NDSolve and matrix formulation do not produce the same result. Why and which is more precise? added 1014 characters in body Mar 31 revised NDSolve and matrix formulation do not produce the same result. Why and which is more precise? added 515 characters in body Mar 31 revised NDSolve and matrix formulation do not produce the same result. Why and which is more precise? added 67 characters in body Mar 30 revised NDSolve and matrix formulation do not produce the same result. Why and which is more precise? deleted 72 characters in body Mar 30 revised NDSolve and matrix formulation do not produce the same result. Why and which is more precise? deleted 20 characters in body Mar 30 answered NDSolve and matrix formulation do not produce the same result. Why and which is more precise? Mar 29 revised Probability of distance of two random points in the unit circle deleted 26 characters in body Mar 29 comment Probability of distance of two random points in the unit circle looks spot on.. Mar 29 revised Probability of distance of two random points in the unit circle deleted 43 characters in body Mar 29 answered Probability of distance of two random points in the unit circle Mar 29 comment Envelope of a given table (or plot) Mar 29 answered How cut any integer number? Mar 29 comment problem in solving equation Look at MatrixForm[(a.b - b.a)] and MatrixForm[(2 I c f)], you can see by inspection there is no f to make them equal. Mar 29 comment problem in solving equation I pasted the code in for you. You get no solution because there is no solution. Mar 29 revised problem in solving equation added 189 characters in body Mar 29 comment How to ListContourPlot a functional eigenvalue spectrum? @J.M. not so for this example. Actually those spurious bands are in the region where there are complex eigenvalues. I guess not worth worrying about since its a toy example. Mar 29 revised How to ListContourPlot a functional eigenvalue spectrum? added 518 characters in body Mar 29 answered How to ListContourPlot a functional eigenvalue spectrum? Mar 28 comment How to ListContourPlot a functional eigenvalue spectrum? does a contour represent the locus where "any" eigenvalue is equal to some specified value? As noted your first example is not a documented usage and its not really clear what its doing.