x=var('x') f = Piecewise([[(0,pi/2),-1],[(pi/2,pi),2]]) plot(f(x),(x,0,pi))
? ValueError: Value not defined outside of domain. ?
x=var('x') f = Piecewise([[(0,pi/2),-1],[(pi/2,pi),2]]) plot(f(x),(x,0,pi))
? ValueError: Value not defined outside of domain. ?