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In most cases, (thorn)-forking in $T$ is equivalent to (thorn)-forking of algebraic closures in some $T_i$.\n  This applies to fields with an action by $(\\mathbb{Q}, +)$, whose reducts to finite subsignatures are inte"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1508.06007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.LO","submitted_at":"2015-08-25T01:52:57Z","cross_cats_sorted":[],"title_canon_sha256":"22b1291841b1e536ae6b26a20bba5ccfebf86db3565b375f55b44d491c00ff69","abstract_canon_sha256":"7076773b2abc660cd0789d26c0fa829df20bb78b53b1fee2ff07b074ffeb58f8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:47.149678Z","signature_b64":"HAtNLDDqJVLxuWJbud8cYMPJ0KuCTB6nKhXaE1R9cFnut91nBtzyMpj+mc1kS1M8u3qiovFjESg+fs/2UTrbDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ad36c8db85b7a8b606e0570cfadef05e5c3419c18b3db9bffd178c5676b87a5","last_reissued_at":"2026-05-18T01:34:47.149014Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:47.149014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"$\\mathbb{Q}$ACFA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.LO","authors_text":"Alice Medvedev","submitted_at":"2015-08-25T01:52:57Z","abstract_excerpt":"We show that many nice properties of a theory $T$ follow from the corresponding properties of its reducts to finite subsignatures. 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