In a paper by Stark where he proves Gauss conjecture that there are only nine imaginary qudratic fields where the integers form a UFD writes that Heegner used "classified theory".

I once met Stark and asked him if did not correct the misprint on purpose, but he did not even remember it.

In a paper by Stark where he proves Gauss's conjecture that there are only nine imaginary quadratic fields where the integers form a UFD, he writes that Heegner used "classified theory".

I once met Stark and asked him if he did not correct the misprint on purpose, but he did not even remember it.