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Add balanced truncation and operator inference - #203
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ChrisRackauckas merged 2 commits intoSep 9, 2026
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Runic rejected the four files this branch adds, plus the import block in the module file, and typos rejected `Ot`, the transpose of the operator matrix in operator inference. Both would have failed CI on the first push. Formatting is Runic's own output and changes no behavior; the tests still pass. Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com> Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Agent-Harness: Claude Code 2.1.263 Agent-Model: claude-opus-5 Agent-Session: https://claude.ai/code/session_01H5RuLDtEazwTKPkNbPeZVu Claude-Session: https://claude.ai/code/session_01H5RuLDtEazwTKPkNbPeZVu
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- Add balanced truncation and operator inference (#203) Agent-Harness: Claude Code Agent-Model: claude-opus-5[1m] Claude-Session: https://claude.ai/code/session_014FEzNTLFutCmTEAZ3zBg5R Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Summary
baltruncwith optional residualization, returning aBalancedTruncationresult (Hurwitz check, near-zero HSV filtering).opinffor linear / quadratic / input / constant reduced operators from snapshot/derivative data, plusreduced_dynamicsevaluation.Test plan
test/balanced_truncation.jl(15 tests): dominant-mode recovery, residualized DC gain, Hurwitz / dimension checkstest/operator_inference.jl(24 tests): exact linear/quadratic/input/constant recovery, POD path, monomial ordering, API checksGROUP=Core/GROUP=QAon the PRjulia --project=docs docs/make.jlMade with Cursor