{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:E6XKQVXWIDNU6ZUNBAQXXUWF3Q","short_pith_number":"pith:E6XKQVXW","canonical_record":{"source":{"id":"1711.07129","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"math.AG","submitted_at":"2017-11-20T03:27:51Z","cross_cats_sorted":[],"title_canon_sha256":"37979b5a6e7fa4db9708853b262fdde268db2431e22ccc7cb0b9e3364ba70aaa","abstract_canon_sha256":"84314fdd718adf0abdd3e493ea865450f1e054f804e7697e7c282bd532f4dd11"},"schema_version":"1.0"},"canonical_sha256":"27aea856f640db4f668d08217bd2c5dc3f9db28cb04522f271559a8b02a5b7d5","source":{"kind":"arxiv","id":"1711.07129","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07129","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07129v2","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07129","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"E6XKQVXWIDNU","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E6XKQVXWIDNU6ZUN","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E6XKQVXW","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:E6XKQVXWIDNU6ZUNBAQXXUWF3Q","target":"record","payload":{"canonical_record":{"source":{"id":"1711.07129","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"math.AG","submitted_at":"2017-11-20T03:27:51Z","cross_cats_sorted":[],"title_canon_sha256":"37979b5a6e7fa4db9708853b262fdde268db2431e22ccc7cb0b9e3364ba70aaa","abstract_canon_sha256":"84314fdd718adf0abdd3e493ea865450f1e054f804e7697e7c282bd532f4dd11"},"schema_version":"1.0"},"canonical_sha256":"27aea856f640db4f668d08217bd2c5dc3f9db28cb04522f271559a8b02a5b7d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:29:05.324213Z","signature_b64":"JaOPyPTXBt0Xysn/PGrTarSe9Di/WOEvEsBQ3f98b1BC2kef57zXAS1WAl4jUJM3zT/DEHvLuOkXH/3KooY7Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"27aea856f640db4f668d08217bd2c5dc3f9db28cb04522f271559a8b02a5b7d5","last_reissued_at":"2026-05-18T00:29:05.323533Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:29:05.323533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.07129","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VRtdi1KIFQujnRTd5FWswFC66BoLQO4agGZzOwUPTGBss1f+DuRsyF4j3MXtVqxTNOToTUDfegRfmNwQ8kZpAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T06:43:33.773659Z"},"content_sha256":"b9337aa2303d482a26400289c64954ae829e17db19ac3619bfcab5fe62196c00","schema_version":"1.0","event_id":"sha256:b9337aa2303d482a26400289c64954ae829e17db19ac3619bfcab5fe62196c00"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:E6XKQVXWIDNU6ZUNBAQXXUWF3Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Categorical characterization of quadrics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Duo Li","submitted_at":"2017-11-20T03:27:51Z","abstract_excerpt":"We give a characterization of smooth quadrics in terms of the existence of full exceptional collections of certain type, which generalizes a result of C.Vial for projective spaces."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07129","kind":"arxiv","version":2},"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":"2026-05-18T00:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d012Hm0Q+rCxGzYZERd7I+tTsxZlZJnqa0iReywBSbOCoPxIbfCXIAqcCMdGenYEE9KwnjsVsb5gV7xInrxtCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T06:43:33.774395Z"},"content_sha256":"688d3cec9a782d3736eb0bd9b4bc30e5180702beb8f1a7ca93e2f962a634fdcd","schema_version":"1.0","event_id":"sha256:688d3cec9a782d3736eb0bd9b4bc30e5180702beb8f1a7ca93e2f962a634fdcd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/bundle.json","state_url":"https://pith.science/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/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":"2026-06-11T06:43:33Z","links":{"resolver":"https://pith.science/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q","bundle":"https://pith.science/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/bundle.json","state":"https://pith.science/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E6XKQVXWIDNU6ZUNBAQXXUWF3Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:E6XKQVXWIDNU6ZUNBAQXXUWF3Q","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":"84314fdd718adf0abdd3e493ea865450f1e054f804e7697e7c282bd532f4dd11","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"math.AG","submitted_at":"2017-11-20T03:27:51Z","title_canon_sha256":"37979b5a6e7fa4db9708853b262fdde268db2431e22ccc7cb0b9e3364ba70aaa"},"schema_version":"1.0","source":{"id":"1711.07129","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07129","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07129v2","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07129","created_at":"2026-05-18T00:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"E6XKQVXWIDNU","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E6XKQVXWIDNU6ZUN","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E6XKQVXW","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:688d3cec9a782d3736eb0bd9b4bc30e5180702beb8f1a7ca93e2f962a634fdcd","target":"graph","created_at":"2026-05-18T00:29:05Z","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 give a characterization of smooth quadrics in terms of the existence of full exceptional collections of certain type, which generalizes a result of C.Vial for projective spaces.","authors_text":"Duo Li","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"math.AG","submitted_at":"2017-11-20T03:27:51Z","title":"Categorical characterization of quadrics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07129","kind":"arxiv","version":2},"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:b9337aa2303d482a26400289c64954ae829e17db19ac3619bfcab5fe62196c00","target":"record","created_at":"2026-05-18T00:29:05Z","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":"84314fdd718adf0abdd3e493ea865450f1e054f804e7697e7c282bd532f4dd11","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"math.AG","submitted_at":"2017-11-20T03:27:51Z","title_canon_sha256":"37979b5a6e7fa4db9708853b262fdde268db2431e22ccc7cb0b9e3364ba70aaa"},"schema_version":"1.0","source":{"id":"1711.07129","kind":"arxiv","version":2}},"canonical_sha256":"27aea856f640db4f668d08217bd2c5dc3f9db28cb04522f271559a8b02a5b7d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"27aea856f640db4f668d08217bd2c5dc3f9db28cb04522f271559a8b02a5b7d5","first_computed_at":"2026-05-18T00:29:05.323533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:29:05.323533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JaOPyPTXBt0Xysn/PGrTarSe9Di/WOEvEsBQ3f98b1BC2kef57zXAS1WAl4jUJM3zT/DEHvLuOkXH/3KooY7Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:29:05.324213Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.07129","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b9337aa2303d482a26400289c64954ae829e17db19ac3619bfcab5fe62196c00","sha256:688d3cec9a782d3736eb0bd9b4bc30e5180702beb8f1a7ca93e2f962a634fdcd"],"state_sha256":"70eaa57ec259a30db370d869760433f99fc447de44d3c42ca33a036758075c87"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UiuBkDexcsMSCW2GgfV+f47tk2VFKIIwcgLla2SSqRsrKzxu7hM88NK2ZKxlbdCBvQtRniHRWiH/9Oz2BajxAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T06:43:33.778331Z","bundle_sha256":"a60b757ed1f99df30bd608b979aada6e77e5a78ab693596b7faf4cb51d40388a"}}