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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | --Copyright The Numerical Algorithms Group Limited 1994.
-- some laplace transforms
)cl all
f n == t**(n-1)*exp(-a*t)/factorial(n-1)
-- L(f n) is 1/(s+a)^n
f 2
laplace(%, t, s)
f 5
laplace(%, t, s)
sin(a*t) - a*t*cos(a*t)
laplace(%, t, s)
(cosh(a*t) - cos(a*t))/(2*a**2)
laplace(%, t, s)
exp(-a*t) * sin(b*t) / b**2
laplace(%, t, s)
sin(a*t) * cosh(a*t) - cos(a*t) * sinh(a*t)
laplace(%, t, s)
(exp(a*t) - exp(b*t))/t
laplace(%, t, s)
2/t * (1 - cosh(a*t))
laplace(%, t, s)
2/t * (1 - cos(a*t))
laplace(%, t, s)
(cos(a*t) - cos(b*t))/t
laplace(%, t, s)
-- we handle some very limited form of special functions
a*Ci(b*t) + c*Si(d*t)
laplace(%, t, s)
exp(a*t+b)*Ei(c*t)
laplace(%, t, s)
-- we keep unknown transforms as formal transform in the answer
sin(a*t) - a*t*cos(a*t) + exp(t**2)
laplace(%, t, s)
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