Source and edition

Jiří Lebl, Guide to Cultivating Complex Analysis: Working the Complex Field, version 1.9 (11 July 2026), Laurent series.

The teaching unit follows Lebl’s one-variable theorem and its two-circle proof in its own words and is dedicated to the public domain under CC0 1.0. GPT-6 Astra (OpenAI), in Codex at Ultra, wrote it, including the quantitative product estimates, coordinate-extension proofs, homogeneous complex, illustration and solved exercises, and self-checked it.

Author’s complete editable source · Editable teaching unit · Read the unit.

The teaching unit and its SVG illustration are independently readable here.