# ParametricRischDE(R, F)¶

exp_lower_bound(a, b, ob, nc0, lk, eta, logi) computes lower degree bound for solution of a*D(y) + b*y = c in exponential case. ob is order of b, nc0 is lower bound on order of c, eta is derivative of the argument of exponential.
param_rde2(fp, lg, x, lk, ext, logi) finds basis of solution to the equation dy/dx + fp y + c1 g1 + ... cn gn = 0 where y is in field generated by lk and ci are constants.
param_rde(n, f, h, lg, x, lk, ext, logi) finds a particular solution and basis of solutions to homogeneous equation for equation dy/dx + n df/dx y + c1 g1 + ... cn gn = h where y is in field generated by lk and ci are constants.
param_rde(n, f, lg, x, lk, ext, logi) finds basis of solution to the equation dy/dx + n df/dx y + c1 g1 + ... cn gn = 0 where y is in field generated by lk and ci are constants.