00:01
For this problem, we are asked to draw the level surfaces or isotherms for the function t of x, y, z, equals x squared minus y squared plus z squared, where we have, ooh, i actually need to make a correction here.
00:12
We want to do that for t equals 0, 1, as well as negative 1 and negative 2.
00:20
So i'll add those in here.
00:25
Let me just make sure that this is coming out correctly here.
00:30
So let's change that to negative one and negative two.
00:40
All right.
00:41
So we can see that we have our green and our purple, or blue, or not purple, sort of burgundy -ish, pink -ish plots coincide exactly.
00:53
So the difference between the two is nothing...