MATH40004 VERSION CROSSWALK AND REVISION NOTES REVISED 2

English passage 1 (6% down the source page) AUDITED_REVISED_2 revision statement

English passage 2 (11% down the source page) The body of this report comes from the previous revised version. Codex's independent review found that the previous main ZIP omitted the 2020 original question booklet and official solutions/marking materials, affecting the 2020 question-level evidence.

English passage 3 (12% down the source page) These question-level claims could not be independently verified within the package.

English passage 4 (15% down the source page) This version includes the original file “MATH40004MATH40011_Calculus and Applications_Q&S;_May_2020(3).pdf” unchanged under 06_SOURCE

English passage 5 (16% down the source page) _EVIDENCE/2020, registered in the original-evidence index and SHA256SUMS. This PDF has 22 pages. Its SHA-256 is:

English passage 6 (19% down the source page) 143a8d4fdaaf7f49f781e464c0794cc7a29cd1f96d25440bc26dafa79164520b Question-level conclusions for 2020–2026 must therefore be read with the original PDFs. Reports cannot replace original materials. Apart from evidence-chain completion and workbook

English passage 7 (22% down the source page) mechanical-format repairs, the report's conclusions have not been recalculated or altered. Version date: 2026-08-06.

English passage 1 (5% down the source page) old-to-new version mapping and revision notes

English passage 1 (5% down the source page) status of old-version files

English passage 2 (9% down the source page) The following old files remain in their historical locations but are all marked INACTIVE / DO NOT IMPORT: the six-paper compilation, eight-paper compilation, solution compilation, 50-knowledge-point coverage matrix, old replacement matrix and old QC report. The final ZIP excludes these files.

English passage 3 (14% down the source page) old-to-new correspondence

English passage 4 (19% down the source page) Old material | New material | Main changes Old P1 | Revised P1 | Only this paper retains 2026 structural reinforcement; replace functions, models, matrices and integrating factors. Old P2/part of P7 | Revised P2 | Rebuild as a 2025 bridge: series/iteration, Fourier translation/convolution, Euler-Cauchy, Jordan, double bifurcation and Jacobian/Hessian. Old P3/part of P4 | Revised P3 | Organise by 2023–2024 entry points, not 2026 question numbers. Earlier historical content in old P5 | Revised P4 | Concentrate on 2020–2022 definitions, parametric curves, Fresnel, centroids, sign-function Fourier, Green and zero-eigenvalue lines. Gap content in old P7 | Revised P5 | Driven by the A/B matrix; fills gaps in flat functions, Heaviside, given phase portraits, Hessian and related abilities. Old P6/P8 | Revised P6 | Remove the four-slot 2026 replication and use mixed transfer: arc centroids, centre resonance, single-variable integrating factors and nonstandard singularity collisions. Old solutions | COURSE_METHOD_AUDITED solutions

English passage 5 (42% down the source page) Main solutions are rewritten using official methods and add recognition signals, first steps, errors and self-checks. Old coverage matrix → Effective-coverage matrix: replace binary knowledge-point flags with an A/B/C/D ability-unit matrix.

English passage 6 (49% down the source page) file naming rules

English passage 7 (53% down the source page) Question filenames contain REVISED_HISTORICAL_COVERAGE; solution filenames contain COURSE_METHOD_AUDITED. The Codex list uses unique stable IDs: math40004-revised-p1 through p6.

English passage 8 (58% down the source page) correct rather than erase history

English passage 9 (62% down the source page) Old files remain in the user's history for traceability. The list, manifest and final ZIP do not reference them, preventing simultaneous website versions.