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gfun[holexprtodiffeq] - produce a differential equation satisfied by a holonomic expression
Calling Sequence
holexprtodiffeq(expr, y(z))
Parameters
expr
-
holonomic expression in y(z)
y
name; holonomic function name
z
name; variable of the holonomic function y
Description
The gfun[holexprtodiffeq](expr, y(z)) command produces a differential equation satisfied by the holonomic expression expr.
If expr is a holonomic expression, then the gfun[holexprtodiffeq] function returns a differential equation in y and z that is satisfied by expr. Initial conditions are returned when possible.
Not all holonomic functions are recognized by holexprtodiffeq. It currently accepts the following functions.
BesselI
BesselJ
BesselK
BesselY
arccos
arccosh
arccot
arccoth
arccsc
arccsch
arcsec
arcsech
arcsin
arcsinh
arctan
arctanh
cos
cosh
erf
erfc
exp
ln
sin
sinh
Examples
See Also
BesselJ, gfun, gfun[diffeqtohomdiffeq], gfun[diffeqtorec]
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