z axis too long in 3dplot in sage

Question

I'm trying to make this plot for the Łukasiewicz t-norm

and I don't know how to make the z axis go only from 0 to 1, mine goes from -1 to 1 and I need that flat area to be visible.

Now I have

def luka_tnorm(a, b):
    c = a + b - 1
    return max(c, 0)

plot3d(luka_tnorm(a, b), (a, 0, 1), (b, 0, 1))

My plot now looks like this

Answer 1

Try this:

sage: plot3d(luka_tnorm, (0, 1), (0, 1))
Launched html viewer for Graphics3d Object
sage: plot3d(luka_tnorm, (0, 1), (0, 1), mesh=True)
Launched html viewer for Graphics3d Object