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Orbifold subadditivity hypothesis ledger

Family 033: Iitaka subadditivity, variation, and logarithmic additivity. First application triage, 9 October 2026 Australia/Brisbane.

Problem and potential new use

Help algebraic-geometry researchers compare Kodaira dimension bounds for fibrations with orbifold or logarithmic data.

Applicability and commercial boundary

Fujiki-class, rational boundary and base assumptions differ between companion statements; no efficient fibration classifier follows.

Initial business decision

Research reference or conditional symbolic/verification engineering. No recurring buyer need, practical implementation or profitability has been demonstrated. Defer a standalone commercial product until a constructive example and a measurable workflow improvement exist. These records also identify unsupported inferences that an evidence platform could flag.

Next verification action

Extract each fibration input and identify one symbolic example with computable invariants.

Evidence scope

The repository catalog statement was individually read. Main-paper construction, effectiveness and selected formal-scope comparison remain queued for this record. No independent Lean verification was run. Source revision fd4aeeb2ee4fc729c18d98444fed42fd0529eeeb. See source metadata.

Orbifold and logarithmic Iitaka subadditivity.