{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:24CK2CAYPMD56ESDVSNIJUWQFN","short_pith_number":"pith:24CK2CAY","canonical_record":{"source":{"id":"1904.06313","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-04-12T16:42:04Z","cross_cats_sorted":[],"title_canon_sha256":"319938499e15ff76654f0fb2133dcb3d533a357a22dd90a1221d369e5a0adc6d","abstract_canon_sha256":"e4361bc8929ed15946dfaa36ee45ff40c2bf6be089daf81f3eef634102415532"},"schema_version":"1.0"},"canonical_sha256":"d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf","source":{"kind":"arxiv","id":"1904.06313","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06313","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06313v1","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06313","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"pith_short_12","alias_value":"24CK2CAYPMD5","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"24CK2CAYPMD56ESD","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"24CK2CAY","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:24CK2CAYPMD56ESDVSNIJUWQFN","target":"record","payload":{"canonical_record":{"source":{"id":"1904.06313","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-04-12T16:42:04Z","cross_cats_sorted":[],"title_canon_sha256":"319938499e15ff76654f0fb2133dcb3d533a357a22dd90a1221d369e5a0adc6d","abstract_canon_sha256":"e4361bc8929ed15946dfaa36ee45ff40c2bf6be089daf81f3eef634102415532"},"schema_version":"1.0"},"canonical_sha256":"d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:43.622299Z","signature_b64":"4XJbo+bcZNb37sT7gQQtLuoFgssyOFyqRBS4BZjm8eszr1Bs4qODL07GofdrXeWHdr0fvnnHSJSJ5WjxxB8IBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf","last_reissued_at":"2026-05-17T23:48:43.621727Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:43.621727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.06313","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dNe5eyaJCUaj5TCYKl3Dj7gQ1szkW33K3RzsdirerrB2eJaIbOM+Y3z1pv12+74Kgl30btSyRRQcaRW8SluuCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:00:36.511046Z"},"content_sha256":"02b3a3e4b3d1db8b01e076ac5581f6a04e8eea0e269eb287a0240dc59b6696b1","schema_version":"1.0","event_id":"sha256:02b3a3e4b3d1db8b01e076ac5581f6a04e8eea0e269eb287a0240dc59b6696b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:24CK2CAYPMD56ESDVSNIJUWQFN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Varieties of planes on intersections of three quadrics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Brendan Hassett, Yuri Tschinkel","submitted_at":"2019-04-12T16:42:04Z","abstract_excerpt":"We study the geometry of spaces of planes on smooth complete intersections of three quadrics, with a view toward rationality questions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06313","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r4DmvSnvsV0tblu0tQ0xMOUOPP0O7Euphl8Mgg4lKySehvlleu1Gx2icd8TqlCdM+FQuBkp5ywkMYuZw79szDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:00:36.511405Z"},"content_sha256":"240b2356fefd266955d4af82be15f5a00dce983ac11a3ab8abb821d102a19b78","schema_version":"1.0","event_id":"sha256:240b2356fefd266955d4af82be15f5a00dce983ac11a3ab8abb821d102a19b78"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN/bundle.json","state_url":"https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24CK2CAYPMD56ESDVSNIJUWQFN/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T18:00:36Z","links":{"resolver":"https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN","bundle":"https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN/bundle.json","state":"https://pith.science/pith/24CK2CAYPMD56ESDVSNIJUWQFN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24CK2CAYPMD56ESDVSNIJUWQFN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:24CK2CAYPMD56ESDVSNIJUWQFN","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e4361bc8929ed15946dfaa36ee45ff40c2bf6be089daf81f3eef634102415532","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-04-12T16:42:04Z","title_canon_sha256":"319938499e15ff76654f0fb2133dcb3d533a357a22dd90a1221d369e5a0adc6d"},"schema_version":"1.0","source":{"id":"1904.06313","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06313","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06313v1","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06313","created_at":"2026-05-17T23:48:43Z"},{"alias_kind":"pith_short_12","alias_value":"24CK2CAYPMD5","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"24CK2CAYPMD56ESD","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"24CK2CAY","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:240b2356fefd266955d4af82be15f5a00dce983ac11a3ab8abb821d102a19b78","target":"graph","created_at":"2026-05-17T23:48:43Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We study the geometry of spaces of planes on smooth complete intersections of three quadrics, with a view toward rationality questions.","authors_text":"Brendan Hassett, Yuri Tschinkel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-04-12T16:42:04Z","title":"Varieties of planes on intersections of three quadrics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06313","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:02b3a3e4b3d1db8b01e076ac5581f6a04e8eea0e269eb287a0240dc59b6696b1","target":"record","created_at":"2026-05-17T23:48:43Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e4361bc8929ed15946dfaa36ee45ff40c2bf6be089daf81f3eef634102415532","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-04-12T16:42:04Z","title_canon_sha256":"319938499e15ff76654f0fb2133dcb3d533a357a22dd90a1221d369e5a0adc6d"},"schema_version":"1.0","source":{"id":"1904.06313","kind":"arxiv","version":1}},"canonical_sha256":"d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d704ad08187b07df1243ac9a84d2d02b5fac1269727fc3bb503e8ba2e4ceffaf","first_computed_at":"2026-05-17T23:48:43.621727Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:43.621727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4XJbo+bcZNb37sT7gQQtLuoFgssyOFyqRBS4BZjm8eszr1Bs4qODL07GofdrXeWHdr0fvnnHSJSJ5WjxxB8IBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:43.622299Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.06313","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02b3a3e4b3d1db8b01e076ac5581f6a04e8eea0e269eb287a0240dc59b6696b1","sha256:240b2356fefd266955d4af82be15f5a00dce983ac11a3ab8abb821d102a19b78"],"state_sha256":"b5365f23b4341fcc2150382a13ae3a88ae4696deb4cf68f8cf59f6aebe1a4e93"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rPcnTYjcsj7LldNT6Zqn3AhZV0Rgm759BbgBKtmodkPnl8OsFKK+oqojkcaM2IchQSH8PE5YY6miDApYk6nECQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T18:00:36.513408Z","bundle_sha256":"5e7c4cf3cffc7e0993c7881e51b1ca6b13cd8c1661a513d6b19290f4035c3319"}}