Emily Deibert

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« on: September 23, 2015, 11:38:10 PM »
Hi Professor,

In section 2.1.2 of the online textbook ("Constant Coefficients") you have written in the example:

"Consider initial value condition u|t = 0 = f(x). It allows us define Ï•: Ï•(x) = f(x)"

I'm wondering: do you mean that f(x) = 0? Or should the statement read:

Consider initial value condition u|t=0 = f(x)

implying that f(x) is the value of u where t = 0?

Thank you for the help!

Emily Deibert

• APM346
• Elder Member
• Posts: 100
• Karma: 0
Re: Clarification about Textbook Section 2.1.2
« Reply #1 on: September 23, 2015, 11:56:33 PM »
To reply to my own question, after reading further in the online textbook it seems clear that the condition was that u(x,0) = f(x), not that f(x) = 0.