Maxima Function
gauss_a (a, b, c, x)
gauss_a(a,b,c,x) and gauss_b(a,b,c,x) are 2F1
geometric functions. They represent any two independent
solutions of the hypergeometric differential equation
x(1-x) diff(y,x,2) + [c-(a+b+1)x diff(y,x) - aby = 0 (A&S 15.5.1).
The only use of these functions is in solutions of ODEs returned by
odelin and contrib_ode. The definition and use of these
functions may change in future releases of Maxima.