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Re: Mathematica and Mathieu DEQ Results?
Hi, 1) your DEQ is misspelled. I'll assume you meant DSolve[x''[t] + (4 Pi^2 - 2 ((-Pi^2/5) Cos[2 (Pi t)/100])) x[t] == 0, x[t], t] 2) your DEQ is of second order, so there are only two independent solutions; AFAIK there is no way that there could be more non-unique solutions. 3) the easiest way of checking the answers is back-substitution: you'll see that one answer (by Mathematica) is correct and the other (by mathworld) is not. Roman.