# How to find series solutions, Appendix 4 and section 4.7 # regular and singular points # Help: ?dsolve,series de1 := diff(y(x),x,x)+y(x)=x+1; de2 := 4*x^2*diff(y(x),x,x)+6*x*diff(y(x),x)+x*y(x)=0; dsolve(de2,y(x),series); Order:=10;dsolve({de1,y(0)=0,D(y)(0)=1},y(x),series);