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Consider the extremal case where phi(h(X)) = t(X). In the situation where T_{X} is unimodular, Kondo has determined the list of t(X), as well as the actual realizations, and showed that t(X) alone uniquely determines the isomor"},"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":"math/9906006","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"math.AG","submitted_at":"1999-06-01T22:11:08Z","cross_cats_sorted":[],"title_canon_sha256":"c1c5acb9a9054c91fbfc7110303ae7a8ebea346e0a5547bb516bd3d23ec63421","abstract_canon_sha256":"1ca98c1aa76f231dc0b9a6fe761d7e502dca1c1623a852b1ceebab38c1d126b9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:57.471550Z","signature_b64":"12MEuu6HD/n8Ok17wiSQpaBsYAhhxzmClDVTo7oZnL917hoCpwx1dRwmkNPiLzHBOspdgjsHlnYV70L03TjJAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"98d2b177dccbf60d0e528ee7ba13e9c67bf2c9db96d883c24c2901717384a204","last_reissued_at":"2026-05-18T00:12:57.471028Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:57.471028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On Vorontsov's theorem on K3 surfaces","license":"","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"D. -Q. 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