A formal proof for the fpmax module has been created here: https://git.libre-riscv.org/?p=ieee754fpu.git;a=blob;f=src/ieee754/fpmax/formal/proof_fmax_mod.py;h=700811963a89b4608d87b2d34791d392ddb60d6d;hb=HEAD It can be run by running: python -m ieee754.fpmax.formal.proof_fmax_mod