Messages

16

HA3 / Re: HA3-P1

« on: October 03, 2015, 06:21:10 PM »

Do we need to derive general solution for u_tt - c²u_xx = 0 during exam??
Or we can just use it directly ?

17

Quiz 1 / Re: Quiz1-P1

« on: October 02, 2015, 11:13:39 PM »

I think the first one is semilinear because it depends on definition 2 in Chapter 2.1 in textbook. In this case, b=b (x, y) and I don't think similinear is type of linear. So I don't get why it is linear.

18

Quiz 1 / Quiz1-P1

« on: October 02, 2015, 07:41:46 PM »

(a)  u_x + xu_y = 0   non-linear linear homogeneous. V.I.
(b)  u_x + uu_y = 0  quasilinear

I am not sure of expressions of this two equations, but my answer for the first one is non-linear and the second one is quasilinear.