% FritzJohnHomotopy.input CONFIG UserHomotopy:2; END; INPUT function F,G1,G2,patch; variable_group x1,x2; variable_group l0,l1; constant y1,y2,eps,a0,a1; pathvariable T; parameter t; t = T; y1 = 0.5; y2 = 0.8; eps = 1.1 + 0.7*I; a0 = -1.3; a1 = 1.7; F = x2^2 + x1^2*(x1-1)^3*(x1-2) - t*eps; G1 = l0*(x1-y1) + l1*x1*(x1-1)^2*(6*x1^2-13*x1+4); G2 = l0*(x2-y2) + 2*l1*x2; patch = a0*l0 + a1*l1 - 1; END;