Georg Ferdinand Ludwig Philipp Cantor
The life of Georg Ferdinand Ludwig Philipp Cantor - Some Infinites Are Larger Than Others
Cantor's Theorem
Proves that the power set of any set is strictly larger than the set itself.
\[ |A| < |2^A| \]
Cantor's Diagonal Argument
A clever argument showing that the real numbers are uncountably infinite.
\[ s_{n,n} \to 1 - s_{n,n} \]
Sources: https://mathshistory.st-andrews.ac.uk/Biographies/Cantor/


