APM346-2018S > APM346--Lectures

potential

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Jingxuan Zhang:
http://www.math.toronto.edu/courses/apm346h1/20181/PDE-textbook/Chapter7/S7.2.html

My question is concerning equations $(9),(10)$. First what is $u(y)$ in fact? is that some sort of charge? is "charge" and "potential" the same? are they sort of energy? (You must know the asker is barely exposed to Physics.) Secondly, if $u=u(y)$ then what is meant by $\Delta u$?

Also I think it will be good if the online text is open to edit. Very often I can find such trivial typos that do not worth of posting here, but are nonetheless quite obstentious.

Victor Ivrii:
Wait for today lecture