In the game, this is a theorem called the "first sub-boss of Multiplication World." You will prove it by mobilizing all the theorems built up so far: mul_zero, zero_mul, succ_mul, and mul_succ. The ...

Here's a dumb idea that turned out to work. A GPU virtual machine with exactly one instruction, so that divergence stops being something I ever have to think about. Sometimes you have to run a program ...