{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:6M5N6IN4ADDF7WZMHBZZLN4JWN","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":"c8c20d3fcbbc834b45bb5aa526dbcab40c3aa7f97bb68a19302efe54c3da3a0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2014-01-15T04:53:22Z","title_canon_sha256":"d78a3f3aa5d54b2f40fa4800fb714405c52d1b4a719638b66239f1c699273fe9"},"schema_version":"1.0","source":{"id":"1401.3438","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.3438","created_at":"2026-05-18T03:02:09Z"},{"alias_kind":"arxiv_version","alias_value":"1401.3438v1","created_at":"2026-05-18T03:02:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.3438","created_at":"2026-05-18T03:02:09Z"},{"alias_kind":"pith_short_12","alias_value":"6M5N6IN4ADDF","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6M5N6IN4ADDF7WZM","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6M5N6IN4","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:0616b7bc7d12de2a7232b16960c01dc0fbf930c13e8d5b31084abd6f32d90e48","target":"graph","created_at":"2026-05-18T03:02:09Z","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":"A phylogenetic tree shows the evolutionary relationships among species. Internal nodes of the tree represent speciation events and leaf nodes correspond to species. A goal of phylogenetics is to combine such trees into larger trees, called supertrees, whilst respecting the relationships in the original trees.  A rooted tree exhibits an ultrametric property; that is, for any three leaves of the tree it must be that one pair has a deeper most recent common ancestor than the other pairs, or that all three have the same most recent common ancestor. This inspires a constraint programming encoding f","authors_text":"Neil C.A. Moore, Patrick Prosser","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2014-01-15T04:53:22Z","title":"The Ultrametric Constraint and its Application to Phylogenetics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.3438","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:fdb33fb3336a77fdd53217410388cf01f20c0bc7347802e64ccabfebafd3e56f","target":"record","created_at":"2026-05-18T03:02:09Z","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":"c8c20d3fcbbc834b45bb5aa526dbcab40c3aa7f97bb68a19302efe54c3da3a0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2014-01-15T04:53:22Z","title_canon_sha256":"d78a3f3aa5d54b2f40fa4800fb714405c52d1b4a719638b66239f1c699273fe9"},"schema_version":"1.0","source":{"id":"1401.3438","kind":"arxiv","version":1}},"canonical_sha256":"f33adf21bc00c65fdb2c387395b789b371e6d4c8ad19ffe7e9bdb578aaac7eba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f33adf21bc00c65fdb2c387395b789b371e6d4c8ad19ffe7e9bdb578aaac7eba","first_computed_at":"2026-05-18T03:02:09.175110Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:02:09.175110Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xzGHZWJYnv+F2Vsvxcc8Q6sHaVxWy6fiP5XewWfM8Xz/Rtc7PP9GQpa3kYE22kOB05MyUjBXVo83CmXhVJyxAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:02:09.176619Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.3438","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fdb33fb3336a77fdd53217410388cf01f20c0bc7347802e64ccabfebafd3e56f","sha256:0616b7bc7d12de2a7232b16960c01dc0fbf930c13e8d5b31084abd6f32d90e48"],"state_sha256":"56660c92e3ec0c3dc3747536e3e84af50496996da78cdb3e29c2a05a21b3c69c"}