Non-Calkin unital Banach algebras

Non-Calkin unital Banach algebras

Model / AI: GPT-5.5 Pro

Problem 2 reports a GPT-5.5 Pro argument, subsequently checked and edited by the authors.

Source read 2026-09-08. Read the linked source to identify this individual result and its attribution; proofs were not independently checked.

• Paper — Banach space theory with ChatGPT 5.5 Pro
• Paper — Statement and proof