Automatic Textbook Formalization

ArXi:2604.03071v1 Announce Type: new We present a where an automatic AI system formalizes a textbook with than 500 pages of graduate-level algebraic combinatorics to Lean. The resulting formalization represents a new milestone in textbook formalization scale and proficiency, moving from early results in undergraduate topology and restructuring of existing library content to a full standalone formalization of a graduate textbook.