### Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

### Messages - Laurie Deratnay

Pages: [1]
1
##### Home Assignment 2 / Problem 1
« on: September 27, 2012, 10:06:01 AM »
Hi - In the pdf of home assignment 2 in problem 1 the inequalities throughout are different than the other version of the assignment (i.e. pdf version has 'greater than or equal to' and the other version in only '>').  Which one is correct?

2
##### Home Assignment 1 / Re: Problem 5
« on: September 23, 2012, 04:03:24 PM »
Thanks Jinlong - I was hoping that was the problem!  I've been trying to figure out where that partial wrt to 't' came from ... now it all makes sense.

3
##### Home Assignment 1 / Re: Problem 5
« on: September 23, 2012, 12:10:52 PM »
Ok great - does this mean that I can understand the 2nd auxiliary condition of 5 c) as corresponding physically to a boundary condition on the velocity?

4
##### Home Assignment 1 / Re: Problem 5
« on: September 23, 2012, 09:49:39 AM »
My reason for the asking the above question is that the examples that I have managed to find regarding Goursat problems and the wave equation all have the x<3t which made more sense to me for the integration - after thinking about it I am guessing #5 has x>3t due to the initial velocity?  The examples I was looking at only included initial positions - I was just trying to get a picture of what was happening.

5
##### Home Assignment 1 / Re: Problem 5
« on: September 22, 2012, 08:51:54 PM »
Just wondering if in part c) of problem 5 the question should read: Consider (7) in (x<3t, x>-3t) ?