# g := (x,y) -> (x^2-y^2)/(x^2+y^2); L1 := Limit(g(x,0),x=0) = limit(g(x,0),x=0); L2 := Limit( g(x,x), x=0) = limit(g(x,x),x=0); f := (x,y) -> x*y^2/(x^2+y^4); # Let's try to approach 0 with different lines y = ax, L1 := Limit(f(x,a*x),x=0) = limit(f(x,a*x),x=0); L2 := Limit(f(x,x^2),x=0) = limit(f(x,x^2),x=0) ; L3 := Limit(f(y^2,y),y=0) = limit(f(y^2,y),y=0) ; g := (x,y) -> a*x^2*y/(x^2+y^2); L1 := limit(g(x,m*x),x=0); L2 := limit(g(m*y,y),y=0); L3 := limit(g(x,x^2),x=0); L4 := limit(g(y^2,y),y=0); # # # d := e/a;