Bundle for the Four-loop banana at the mass threshold page(s) of bootloops.ai: everything the page does not link individually — expression file, data, helper modules, checksums. The stand-alone evaluator(s) cy3-banana-evaluate.py are included so the unzipped folder runs as is.

CONTENTS.txt — this list
README.md — what the bundle is, file list, how to run
cy3-banana-expression.md — the result written out: closed forms, reference numerics, certification
cy3-banana-evaluate.py — evaluates the closed forms at any precision against reference strings
direct_linear_extract.py — direct linear decomposition onto the local Frobenius basis, ball arithmetic
threshold_hankel_tail.py — analytic derivation of c_alpha from the Hankel-kernel tail
calpha_rings.py — family / mass-tuple / ring table read by threshold_hankel_tail.py
fixtures/README.md — what the two fixture files are
fixtures/direct_linear_fixtures.json — operators of record, transport path, comparison values for direct_linear_extract.py
fixtures/hankel_tail_fixtures.json — closed-form structures, comparison values, integer relations for threshold_hankel_tail.py
MANIFEST.sha256 — the sha256 of every file in the bundle
LICENSE — MIT license for the code
NOTICE — copyright and license notice; CC BY 4.0 for data and text

Evaluator commands, as printed on the page:

    python3 cy3-banana-evaluate.py
    python3 threshold_hankel_tail.py --check --family CY3 --dps 60
    python3 direct_linear_extract.py --family CY3 --direct-linear 1400 --sdec 1/4

Python 3.9 or later with mpmath; direct_linear_extract.py also needs python-flint and numpy. Verify the files with: sha256sum -c MANIFEST.sha256
