can matlab find ilaplace

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MINATI
MINATI 2019-4-28
评论： MINATI 2019-4-29
F1=ilaplace(exp(-y*sqrt(s+a))/s);
pretty(F1)

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Walter Roberson
Walter Roberson 2019-4-28
MATLAB is not able to find the inverse laplace transform of that.
Maple can find it in terms of an integral, when the assumption that y > 0 is added.
Mathematica can find it in terms of erf and erfc

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TADA
TADA 2019-4-28
Try that:
syms s;
F = exp(-y*sqrt(s+a))/s;
F1 = ilaplace(F);
pretty(F1);
I don't know what a and y are in your case, I assumed constants, but you might need to declare them as symbolic variables as well...
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TADA
TADA 2019-4-28
Now I see it doesn't resolve...
I think some functions cannot be resolved using ilaplace but I'm not an expert
My apologies
TADA
TADA 2019-4-28
From what I can see, there seems to be a general difficulty with exponents

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