10.7NTApr 20
Formalising the Bruhat-Tits TreeJudith Ludwig, Christian Merten
In this article we describe the formalisation of the Bruhat-Tits tree - an important tool in modern number theory - in the Lean Theorem Prover. Motivated by the goal of connecting to ongoing research, we apply our formalisation to verify a result about harmonic cochains on the tree.