{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:EP2OBGANNHSH5HR34IYEVJWNAX","short_pith_number":"pith:EP2OBGAN","canonical_record":{"source":{"id":"1802.04896","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2018-02-13T23:39:52Z","cross_cats_sorted":[],"title_canon_sha256":"99375406ce85b02eae74772f010f05be6c1645f2d01534569e1d6330707df4eb","abstract_canon_sha256":"73b0919350d93a2d8d9cada89d1eca28b36b2dbef596ac3ba38feb1ae5495e86"},"schema_version":"1.0"},"canonical_sha256":"23f4e0980d69e47e9e3be2304aa6cd05fdfbd6e34f184a1a6c38948455bde02e","source":{"kind":"arxiv","id":"1802.04896","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.04896","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1802.04896v1","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.04896","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"EP2OBGANNHSH","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"EP2OBGANNHSH5HR3","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"EP2OBGAN","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:EP2OBGANNHSH5HR34IYEVJWNAX","target":"record","payload":{"canonical_record":{"source":{"id":"1802.04896","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2018-02-13T23:39:52Z","cross_cats_sorted":[],"title_canon_sha256":"99375406ce85b02eae74772f010f05be6c1645f2d01534569e1d6330707df4eb","abstract_canon_sha256":"73b0919350d93a2d8d9cada89d1eca28b36b2dbef596ac3ba38feb1ae5495e86"},"schema_version":"1.0"},"canonical_sha256":"23f4e0980d69e47e9e3be2304aa6cd05fdfbd6e34f184a1a6c38948455bde02e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:22.280764Z","signature_b64":"Ixi5x2oT4xi/1bSFegKFT0aVaWaKBjWQ7SOBeL0AM4ke9TqILmHYMZrPHZMuYfjeMVSkJALqzr9oX+QYLKZqBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23f4e0980d69e47e9e3be2304aa6cd05fdfbd6e34f184a1a6c38948455bde02e","last_reissued_at":"2026-05-18T00:23:22.279991Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:22.279991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.04896","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":"2026-05-18T00:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ClpQew5hHCLdTy4t6N/3wiaLXzsWijzkRtVNPUfdtmGop0B25Cd1Qzdt7/tVNJy4v7atX0iJVXh4PfC+coDZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:01:59.780107Z"},"content_sha256":"69571bf9f3fdb39bc9011e814c80f5b090a68bb24f107f75cf47abba03cb0e9b","schema_version":"1.0","event_id":"sha256:69571bf9f3fdb39bc9011e814c80f5b090a68bb24f107f75cf47abba03cb0e9b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:EP2OBGANNHSH5HR34IYEVJWNAX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-normal purely log terminal centres in characteristic $p \\geq 3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Fabio Bernasconi","submitted_at":"2018-02-13T23:39:52Z","abstract_excerpt":"In this note we show, building on a recent work of Totaro, that for every prime number $p \\geq 3$ there exists a purely log terminal pair $(Z,S)$ of dimension $2p+2$ whose plt centre $S$ is not normal."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.04896","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":"2026-05-18T00:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bTl9pDLjy+4/nnXVMrKyBZXkjiw50tgD6u0Qt4jJeaC8gKYKTE3dH0wCjWolIdNeyEfhP6qkyxnR5tnpT3YABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:01:59.780788Z"},"content_sha256":"da7b2188ebaf1d33b47f9a2e47d223f76d7a774f65ab5ba13972d1da333b2f05","schema_version":"1.0","event_id":"sha256:da7b2188ebaf1d33b47f9a2e47d223f76d7a774f65ab5ba13972d1da333b2f05"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EP2OBGANNHSH5HR34IYEVJWNAX/bundle.json","state_url":"https://pith.science/pith/EP2OBGANNHSH5HR34IYEVJWNAX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EP2OBGANNHSH5HR34IYEVJWNAX/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":"2026-05-28T16:01:59Z","links":{"resolver":"https://pith.science/pith/EP2OBGANNHSH5HR34IYEVJWNAX","bundle":"https://pith.science/pith/EP2OBGANNHSH5HR34IYEVJWNAX/bundle.json","state":"https://pith.science/pith/EP2OBGANNHSH5HR34IYEVJWNAX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EP2OBGANNHSH5HR34IYEVJWNAX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:EP2OBGANNHSH5HR34IYEVJWNAX","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":"73b0919350d93a2d8d9cada89d1eca28b36b2dbef596ac3ba38feb1ae5495e86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2018-02-13T23:39:52Z","title_canon_sha256":"99375406ce85b02eae74772f010f05be6c1645f2d01534569e1d6330707df4eb"},"schema_version":"1.0","source":{"id":"1802.04896","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.04896","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1802.04896v1","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.04896","created_at":"2026-05-18T00:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"EP2OBGANNHSH","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"EP2OBGANNHSH5HR3","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"EP2OBGAN","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:da7b2188ebaf1d33b47f9a2e47d223f76d7a774f65ab5ba13972d1da333b2f05","target":"graph","created_at":"2026-05-18T00:23:22Z","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":"In this note we show, building on a recent work of Totaro, that for every prime number $p \\geq 3$ there exists a purely log terminal pair $(Z,S)$ of dimension $2p+2$ whose plt centre $S$ is not normal.","authors_text":"Fabio Bernasconi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2018-02-13T23:39:52Z","title":"Non-normal purely log terminal centres in characteristic $p \\geq 3$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.04896","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":"sha256:69571bf9f3fdb39bc9011e814c80f5b090a68bb24f107f75cf47abba03cb0e9b","target":"record","created_at":"2026-05-18T00:23:22Z","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":"73b0919350d93a2d8d9cada89d1eca28b36b2dbef596ac3ba38feb1ae5495e86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2018-02-13T23:39:52Z","title_canon_sha256":"99375406ce85b02eae74772f010f05be6c1645f2d01534569e1d6330707df4eb"},"schema_version":"1.0","source":{"id":"1802.04896","kind":"arxiv","version":1}},"canonical_sha256":"23f4e0980d69e47e9e3be2304aa6cd05fdfbd6e34f184a1a6c38948455bde02e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23f4e0980d69e47e9e3be2304aa6cd05fdfbd6e34f184a1a6c38948455bde02e","first_computed_at":"2026-05-18T00:23:22.279991Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:22.279991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ixi5x2oT4xi/1bSFegKFT0aVaWaKBjWQ7SOBeL0AM4ke9TqILmHYMZrPHZMuYfjeMVSkJALqzr9oX+QYLKZqBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:22.280764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.04896","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69571bf9f3fdb39bc9011e814c80f5b090a68bb24f107f75cf47abba03cb0e9b","sha256:da7b2188ebaf1d33b47f9a2e47d223f76d7a774f65ab5ba13972d1da333b2f05"],"state_sha256":"20e26de915aab94b4f6c7a05252a0c9ee99660f973630cf8622e3d467c07f96e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rXOF9ECkr+eCOIc70MS+wcXZPaVsHyoLwkObJXLa3AnnBH2yOxNSaUT1B/Oh6UFvUcxAU8G9koiSv7nR6GJpBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T16:01:59.782928Z","bundle_sha256":"661b1629aad8d36335715bb6d80250e559d2ceedc7ef5358875a81cebfc7ecee"}}