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jyvikoandClaude Opus 5.5 788edbbddd verification: Euler columns and Bryan's plate in buckling steps

buckle-euler-pinned and buckle-euler-cantilever (hex20 columns, −0.18 % from Euler with
Engesser's shear correction) and buckle-plate-square (a simply supported square plate, b/t =
100, −0.39 % from k = 4; the support and thickness choices in its README). ROADMAP and parity
updated, docs/oracle.md regenerated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

2026-10-14 13:30:59 -04:00

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 # Euler buckling of a clamped–free column of solids
 A square column, length 10, side 1, E = 1000, ν = 0 (2 × 2 × 10 hex20), clamped at its base and
 pressed by a unit dead pressure on its free top: effective length 20. Reference: Euler with
 Engesser's shear correction.