- #1
Leb
- 94
- 0
Hi all,
I expect that this might be rarely taught (as I have not found much on the web).
But maybe some of you have encountered this. I attach the problem
At the end the author says to take the limit as t goes to 1. But to me, it does not make sense to look at something that is ε<x<=ε (I mean this is false) and from that to deduce that all the characteristics pass through (x,t)=(1,1)
I expect that this might be rarely taught (as I have not found much on the web).
But maybe some of you have encountered this. I attach the problem
At the end the author says to take the limit as t goes to 1. But to me, it does not make sense to look at something that is ε<x<=ε (I mean this is false) and from that to deduce that all the characteristics pass through (x,t)=(1,1)