{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:OPAU5RYXNLF2DMC5TAMF3JFPYX","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":"4548f59697281e1f483671666bc5078c91269baa48a30d958022f9ace0d594f1","cross_cats_sorted":["cond-mat.dis-nn","cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2014-12-18T07:18:59Z","title_canon_sha256":"8fc6b93f9aad7bcca5a201cd9d1c785d981df2de713a4b22063ec9deed3d6adf"},"schema_version":"1.0","source":{"id":"1412.5738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.5738","created_at":"2026-05-18T02:30:56Z"},{"alias_kind":"arxiv_version","alias_value":"1412.5738v1","created_at":"2026-05-18T02:30:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.5738","created_at":"2026-05-18T02:30:56Z"},{"alias_kind":"pith_short_12","alias_value":"OPAU5RYXNLF2","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"OPAU5RYXNLF2DMC5","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"OPAU5RYX","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:ccb75a483cf19de63dd0ac15c399bc122e2abbf3048b6b70ad5388e4b4e447f2","target":"graph","created_at":"2026-05-18T02:30:56Z","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":"What is the best way to divide a rugged landscape? Since ancient times, watersheds separating adjacent water systems that flow, for example, toward different seas, have been used to delimit boundaries. Interestingly, serious and even tense border disputes between countries have relied on the subtle geometrical properties of these tortuous lines. For instance, slight and even anthropogenic modifications of landscapes can produce large changes in a watershed, and the effects can be highly nonlocal. Although the watershed concept arises naturally in geomorphology, where it plays a fundamental rol","authors_text":"H. J. Herrmann, J. S. Andrade Jr, K. J. Schrenk, N. A. M. Ara\\'ujo","cross_cats":["cond-mat.dis-nn","cond-mat.stat-mech"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2014-12-18T07:18:59Z","title":"Watersheds in disordered media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.5738","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:e5beb9a2d24f60424203835d933448c53853c6ae5bc23b9f2d6536e15f180d0c","target":"record","created_at":"2026-05-18T02:30:56Z","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":"4548f59697281e1f483671666bc5078c91269baa48a30d958022f9ace0d594f1","cross_cats_sorted":["cond-mat.dis-nn","cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2014-12-18T07:18:59Z","title_canon_sha256":"8fc6b93f9aad7bcca5a201cd9d1c785d981df2de713a4b22063ec9deed3d6adf"},"schema_version":"1.0","source":{"id":"1412.5738","kind":"arxiv","version":1}},"canonical_sha256":"73c14ec7176acba1b05d98185da4afc5c75c072000ac9536b9ee4cca5a4102fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73c14ec7176acba1b05d98185da4afc5c75c072000ac9536b9ee4cca5a4102fc","first_computed_at":"2026-05-18T02:30:56.548855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:56.548855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"04/Z+96Hv/MaG0jXOizCsoyDTTN9CcrVZ6Nv+0+5G++ESQXUtWfcDHAoA0bf00BQC0kFsfXC3EkVyNk6FXq7DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:56.549343Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.5738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5beb9a2d24f60424203835d933448c53853c6ae5bc23b9f2d6536e15f180d0c","sha256:ccb75a483cf19de63dd0ac15c399bc122e2abbf3048b6b70ad5388e4b4e447f2"],"state_sha256":"6e2955939039278830d538f44b3238b9d1302d1e50f0d35456543071fd571ac6"}