# Toronto Math Forum

## MAT334-2018F => MAT334--Lectures & Home Assignments => Topic started by: Min Gyu Woo on October 16, 2018, 08:32:30 PM

Title: Chapter 2.1 PG 80
Post by: Min Gyu Woo on October 16, 2018, 08:32:30 PM
There's this little portion of text before the defining Laplace's Equation that I am confused about.

"A word of warning is merited here: Not every function $u(x,y)$ is the real part of an analytic function".
If we always define $f = u +iv$, doesn't this guarentee that $u(x,y)=\text{Re}(f)$?