1
vote
5answers
3k views

What is the difference between the biconditional iff. and equality = ?

Hello, I've been used to writing logical transformations using equality, but the other day it struck me that perhaps I should be using the biconditional $\iff$? So my question is: What is the ...
19
votes
11answers
6k views

Blackboard rendering of math fonts

I learned most of my math font rendering from watching others (for example, I draw ζ terribly). In most cases it is passable, but I'm often uncomfortable using fonts like Fraktur on the board. ...