{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:JDJWZIPAHSBZKVWYCPKU3HW72I","short_pith_number":"pith:JDJWZIPA","schema_version":"1.0","canonical_sha256":"48d36ca1e03c839556d813d54d9edfd23f378dee35dfec29b64413aad64f7684","source":{"kind":"arxiv","id":"1704.01807","version":1},"attestation_state":"computed","paper":{"title":"Degenerations of Gushel-Mukai fourfolds, with a view towards irrationality proofs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Christian B\\\"ohning, Hans-Christian Graf von Bothmer","submitted_at":"2017-04-06T12:40:26Z","abstract_excerpt":"We study a certain class of degenerations of Gushel-Mukai fourfolds as conic bundles, which we call tame degenerations and which are natural if one wants to prove that very general Gushel-Mukai fourfolds are irrational using the degeneration method due to Voisin, Colliot-Th\\'{e}l\\`{e}ne-Pirutka, Totaro et al. However, we prove that no such tame degenerations do exist."},"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":"1704.01807","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2017-04-06T12:40:26Z","cross_cats_sorted":[],"title_canon_sha256":"40941b9ff3ddeebe0ac329fae60f0a0ec7190e915dc044aa72688b38d1e7dc01","abstract_canon_sha256":"34b86ff8ee11d00b394d7574bdcdd8c4b4ceb2a9124b9dc738e63d8bc139e736"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:56.518669Z","signature_b64":"UySVUTowFx567yP+yAwipMC5szvnRvS+7iWXfL7MTOd4ERnJxEH4oYsJ7+OQhzTkCK5NJMp+aX9S0Clg67OmCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48d36ca1e03c839556d813d54d9edfd23f378dee35dfec29b64413aad64f7684","last_reissued_at":"2026-05-18T00:16:56.518048Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:56.518048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Degenerations of Gushel-Mukai fourfolds, with a view towards irrationality proofs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Christian B\\\"ohning, Hans-Christian Graf von Bothmer","submitted_at":"2017-04-06T12:40:26Z","abstract_excerpt":"We study a certain class of degenerations of Gushel-Mukai fourfolds as conic bundles, which we call tame degenerations and which are natural if one wants to prove that very general Gushel-Mukai fourfolds are irrational using the degeneration method due to Voisin, Colliot-Th\\'{e}l\\`{e}ne-Pirutka, Totaro et al. However, we prove that no such tame degenerations do exist."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.01807","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1704.01807","created_at":"2026-05-18T00:16:56.518126+00:00"},{"alias_kind":"arxiv_version","alias_value":"1704.01807v1","created_at":"2026-05-18T00:16:56.518126+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.01807","created_at":"2026-05-18T00:16:56.518126+00:00"},{"alias_kind":"pith_short_12","alias_value":"JDJWZIPAHSBZ","created_at":"2026-05-18T12:31:21.493067+00:00"},{"alias_kind":"pith_short_16","alias_value":"JDJWZIPAHSBZKVWY","created_at":"2026-05-18T12:31:21.493067+00:00"},{"alias_kind":"pith_short_8","alias_value":"JDJWZIPA","created_at":"2026-05-18T12:31:21.493067+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I","json":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I.json","graph_json":"https://pith.science/api/pith-number/JDJWZIPAHSBZKVWYCPKU3HW72I/graph.json","events_json":"https://pith.science/api/pith-number/JDJWZIPAHSBZKVWYCPKU3HW72I/events.json","paper":"https://pith.science/paper/JDJWZIPA"},"agent_actions":{"view_html":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I","download_json":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I.json","view_paper":"https://pith.science/paper/JDJWZIPA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1704.01807&json=true","fetch_graph":"https://pith.science/api/pith-number/JDJWZIPAHSBZKVWYCPKU3HW72I/graph.json","fetch_events":"https://pith.science/api/pith-number/JDJWZIPAHSBZKVWYCPKU3HW72I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I/action/storage_attestation","attest_author":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I/action/author_attestation","sign_citation":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I/action/citation_signature","submit_replication":"https://pith.science/pith/JDJWZIPAHSBZKVWYCPKU3HW72I/action/replication_record"}},"created_at":"2026-05-18T00:16:56.518126+00:00","updated_at":"2026-05-18T00:16:56.518126+00:00"}