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dsolve/formal_solution - find formal solutions to a homogeneous linear ODE with polynomial coefficients
Calling Sequence
dsolve(ODE, y(x), 'formal_solution', 'coeffs'=coeff_type, 'point'=x0)
dsolve(ODE, y(x), 'type=formal_solution', 'coeffs'=coeff_type, 'point'=x0)
Parameters
ODE
-
homogeneous linear ordinary differential equation with polynomial coefficients
y(x)
dependent variable (the indeterminate function)
'type=formal_solution'
(optional) request for formal solutions
'coeffs'=coeff_type
(optional) coeff_type is one of 'mhypergeom', 'dAlembertian'
'point'=x0
algebraic number, rational in parameters, or infinity
Description
When the input ODE is a homogeneous linear ode with polynomial coefficients, and the optional arguments 'formal_solution' (or 'type=formal_solution') and 'coeffs'=coeff_type are given, the dsolve command returns a set of formal solutions with the specified coefficients at the given point (the default is at the origin). For more information, see Slode[mhypergeom_formal_sol] and Slode[dAlembertian_formal_sol].
Examples
Find the formal solution set with m-hypergeometric series coefficients.
Find the formal solution set with d'Alembertian series coefficient.
See Also
DEtools/formal_sol, dsolve, dsolve/formal_series, Slode/dAlembertian_formal_sol, Slode/mhypergeom_formal_sol
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