Help find Feynman's quote about the difference between physicists and mathematicians

Question

Mathematics

I know very vaguely one idea of ​​Feynman. Approximately it sounds like this:

Let's say there are two physical theories that are expressed in "u=0" and "v=0". A physicist will think all his life how to combine these theories into one single one. And the mathematician writes u^2+v^2=0

Nobody knows what book this is from?

Answer 1

www.youtube.com/watch?v=M_MnrzDXEOo

Answer 2

0. From your message it is not very clear what "does not work" means.
Not sending email? Are you not receiving a letter?
What? :)
I was not too lazy and executed your code on my machine. Everything is working.
Specify what is the problem.
1. Never write spaghetti code. Templates should always be separated from logic.
Otherwise, it is impossible to read or support.
Read about MVC for example.
2. It is best to send mail using some kind of library. e.g. swiftmailer