Luigi Bianchi: Modern LaTeX Working Drafts and Source-Intake Witnesses

Dedicated Luigi Bianchi record for the Modern LaTeX Editions of Mathematics Manuscripts project. This record contains Italian source transcription, English translation working drafts, source scan witnesses, and audit/repair packages for Bianchi differential-geometry and transformation-group texts. Status at a glance. Volume I of Lezioni di geometria differenziale remains represented as a package-audited Italian/English working edition through source pdfpages 001-543. The A2 branch, Lezioni sulla teoria dei gruppi continui finiti di trasformazioni, remains in progress through source p0090 / printed manuscript p071. OCR/image-analysis material is witness/locator evidence only; source scans and package audit ledgers control mathematical readings. Latest update. Adds Bianchi_A2_sumfix_p0001_0090_IT_EN_20260612.zip, repairing summation-limit rendering across the cumulative Italian and English A2 TeX/PDF through source p0090. The package adds no new source pages; it revises the current p0078-p0090 and cumulative p0001-p0090 branches so summation signs carry explicit upper ranges and render with \sum\limits. It includes Italian and English TeX/PDF, current/cumulative source witnesses, SUM_LIMIT_AUDIT, repair notes, page/formula ledgers, build logs, render checks, metrics, and checksums. The next continuation remains source p0091. Quality note. These are working/source-witnessed drafts and repair packets, not certified critical editions. Readers should verify important formulas, theorem statements, and notation against the included source witnesses. Corrections and collaboration. Source comparisons, LaTeX fixes, translation corrections, and reader-facing issue reports can be suggested through GitHub issues or pull requests: https://github.com/KokunoYumeto/modern-latex-manuscripts.