Generalized Core Spanner Inexpressibility via Ehrenfeucht-Fraïssé Games for FC
Summary: Derive general inexpressibility lemmas for FC (finite-model concatenation) via Ehrenfeucht-Fraïssé games, yielding concrete non-definable relations. Lift these FC barriers to prove several relations are not selectable by generalized core spanners, sharpening core spanner expressivity limits. (summarized by gpt-5-mini on Feb 09 2026)
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| 3,563 | Spanner Evaluation over SLP-Compressed Documents | 2021 | PODS | 6.9690833e-05 |
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