{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:M3ZGW5SG3K2BNCH4AG7CDDMABF","short_pith_number":"pith:M3ZGW5SG","canonical_record":{"source":{"id":"1907.02727","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-07-05T08:43:42Z","cross_cats_sorted":[],"title_canon_sha256":"7217daf8a93305d580f6dbffab6ed3caeb80be5c01c3373f5817c1a8a2ba1414","abstract_canon_sha256":"572760969a2413ffb22e0d1b6a6aa09b9af7253e30b365cca00c2619cdc64f1d"},"schema_version":"1.0"},"canonical_sha256":"66f26b7646dab41688fc01be218d800970ec1db6d9dbb18dcb25776b9c53e770","source":{"kind":"arxiv","id":"1907.02727","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02727","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02727v2","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02727","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"pith_short_12","alias_value":"M3ZGW5SG3K2B","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"M3ZGW5SG3K2BNCH4","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"M3ZGW5SG","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:M3ZGW5SG3K2BNCH4AG7CDDMABF","target":"record","payload":{"canonical_record":{"source":{"id":"1907.02727","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-07-05T08:43:42Z","cross_cats_sorted":[],"title_canon_sha256":"7217daf8a93305d580f6dbffab6ed3caeb80be5c01c3373f5817c1a8a2ba1414","abstract_canon_sha256":"572760969a2413ffb22e0d1b6a6aa09b9af7253e30b365cca00c2619cdc64f1d"},"schema_version":"1.0"},"canonical_sha256":"66f26b7646dab41688fc01be218d800970ec1db6d9dbb18dcb25776b9c53e770","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:00.497336Z","signature_b64":"am/F7BUGZgZt37vAI8nHVmBORTtDSbNbqPDu08OYOSlisJaNPbXUs/gj5FejsRva2Vpb88UvJRpLX4bZIGMmDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66f26b7646dab41688fc01be218d800970ec1db6d9dbb18dcb25776b9c53e770","last_reissued_at":"2026-05-17T23:41:00.496652Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:00.496652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.02727","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":"2026-05-17T23:41:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d3Sy6ZlDVOgsUY51kfjQDWnb4BmKlTavhyqW63A/JUehzAgvZp8U1OoM6xGpKwRw1pC4ub1mGZmj7sMg+YgrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:15:02.744994Z"},"content_sha256":"39a225e8d2a6edf67dc0c87caff2f18438b219a60101ce1fdd307b1e640e5fce","schema_version":"1.0","event_id":"sha256:39a225e8d2a6edf67dc0c87caff2f18438b219a60101ce1fdd307b1e640e5fce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:M3ZGW5SG3K2BNCH4AG7CDDMABF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Cheltsov--Rubinstein conjecture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AG","authors_text":"Hendrik S\\\"u{\\ss}, Kento Fujita, Kewei Zhang, Yuchen Liu, Ziquan Zhuang","submitted_at":"2019-07-05T08:43:42Z","abstract_excerpt":"In this note we investigate the Cheltsov--Rubinstein conjecture. We show that this conjecture does not hold in general and some counterexamples will be presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02727","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":"2026-05-17T23:41:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yLc34HZASgg7LUAUDwqLFQriysTG9kIr3q/zNrdFQIsY5go85Z16ezqXcbmrumD9Exiu68vyF+vLrBWKhpw8Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:15:02.745664Z"},"content_sha256":"2beff365fc1d8e86f5d71ac9d4cc8fdb8f30fba615d45461d8fabe11ebea76a5","schema_version":"1.0","event_id":"sha256:2beff365fc1d8e86f5d71ac9d4cc8fdb8f30fba615d45461d8fabe11ebea76a5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/bundle.json","state_url":"https://pith.science/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/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":"2026-05-26T05:15:02Z","links":{"resolver":"https://pith.science/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF","bundle":"https://pith.science/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/bundle.json","state":"https://pith.science/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M3ZGW5SG3K2BNCH4AG7CDDMABF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:M3ZGW5SG3K2BNCH4AG7CDDMABF","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":"572760969a2413ffb22e0d1b6a6aa09b9af7253e30b365cca00c2619cdc64f1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-07-05T08:43:42Z","title_canon_sha256":"7217daf8a93305d580f6dbffab6ed3caeb80be5c01c3373f5817c1a8a2ba1414"},"schema_version":"1.0","source":{"id":"1907.02727","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02727","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02727v2","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02727","created_at":"2026-05-17T23:41:00Z"},{"alias_kind":"pith_short_12","alias_value":"M3ZGW5SG3K2B","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"M3ZGW5SG3K2BNCH4","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"M3ZGW5SG","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:2beff365fc1d8e86f5d71ac9d4cc8fdb8f30fba615d45461d8fabe11ebea76a5","target":"graph","created_at":"2026-05-17T23:41:00Z","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 investigate the Cheltsov--Rubinstein conjecture. We show that this conjecture does not hold in general and some counterexamples will be presented.","authors_text":"Hendrik S\\\"u{\\ss}, Kento Fujita, Kewei Zhang, Yuchen Liu, Ziquan Zhuang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-07-05T08:43:42Z","title":"On the Cheltsov--Rubinstein conjecture"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02727","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":"sha256:39a225e8d2a6edf67dc0c87caff2f18438b219a60101ce1fdd307b1e640e5fce","target":"record","created_at":"2026-05-17T23:41:00Z","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":"572760969a2413ffb22e0d1b6a6aa09b9af7253e30b365cca00c2619cdc64f1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AG","submitted_at":"2019-07-05T08:43:42Z","title_canon_sha256":"7217daf8a93305d580f6dbffab6ed3caeb80be5c01c3373f5817c1a8a2ba1414"},"schema_version":"1.0","source":{"id":"1907.02727","kind":"arxiv","version":2}},"canonical_sha256":"66f26b7646dab41688fc01be218d800970ec1db6d9dbb18dcb25776b9c53e770","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66f26b7646dab41688fc01be218d800970ec1db6d9dbb18dcb25776b9c53e770","first_computed_at":"2026-05-17T23:41:00.496652Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:00.496652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"am/F7BUGZgZt37vAI8nHVmBORTtDSbNbqPDu08OYOSlisJaNPbXUs/gj5FejsRva2Vpb88UvJRpLX4bZIGMmDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:00.497336Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.02727","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39a225e8d2a6edf67dc0c87caff2f18438b219a60101ce1fdd307b1e640e5fce","sha256:2beff365fc1d8e86f5d71ac9d4cc8fdb8f30fba615d45461d8fabe11ebea76a5"],"state_sha256":"ca0fa995ccf91726c22b6c62156d0e00e1c0ffdc1545c23277ce750700d7b617"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O3mfQJ9OJI/V8U7XbwEXdJsRZWcD9NuQertha/hYWK6a1VxpzpAmlu2VZlanTDlxJok/DN8ERgD9dEvvZhfCAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T05:15:02.749066Z","bundle_sha256":"b40009d499c4372fe6f8dc20883e1d87267da4768154f2c78bc40e927c1f6a63"}}