{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:XSYJMHP7UQL4YJ6G42OKN4L6VA","short_pith_number":"pith:XSYJMHP7","canonical_record":{"source":{"id":"1812.08737","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-12-20T18:13:41Z","cross_cats_sorted":[],"title_canon_sha256":"bcbec2f6205de0c02c973dd9326aba4dea476df45abedeb1e36bef55eab1fcc5","abstract_canon_sha256":"ac1b5240ff9451f9530c89efb8cc5e140d1a26714f5975caa548493b6689e6d2"},"schema_version":"1.0"},"canonical_sha256":"bcb0961dffa417cc27c6e69ca6f17ea830cda3c7c3184e11ccef59bcdebb625d","source":{"kind":"arxiv","id":"1812.08737","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08737","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08737v2","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08737","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"XSYJMHP7UQL4","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XSYJMHP7UQL4YJ6G","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XSYJMHP7","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:XSYJMHP7UQL4YJ6G42OKN4L6VA","target":"record","payload":{"canonical_record":{"source":{"id":"1812.08737","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-12-20T18:13:41Z","cross_cats_sorted":[],"title_canon_sha256":"bcbec2f6205de0c02c973dd9326aba4dea476df45abedeb1e36bef55eab1fcc5","abstract_canon_sha256":"ac1b5240ff9451f9530c89efb8cc5e140d1a26714f5975caa548493b6689e6d2"},"schema_version":"1.0"},"canonical_sha256":"bcb0961dffa417cc27c6e69ca6f17ea830cda3c7c3184e11ccef59bcdebb625d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:12.424178Z","signature_b64":"OdZYZvMyRTwwHVk8bLHGFrgg+ppXq8pTHwV8Z/sKELl+cCcnKuXTrpe2mXSlYBgYv7wwzeHxUH/Rb9jZHogjDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bcb0961dffa417cc27c6e69ca6f17ea830cda3c7c3184e11ccef59bcdebb625d","last_reissued_at":"2026-05-17T23:41:12.423746Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:12.423746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.08737","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":"2026-05-17T23:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9mz42BgAxa8SD1UZ1sJsMRHd2Odx9qvnVazRIEETWYQedU9uC5dGclCUxYBAdnn1bkiNXCwRff4K3Nlo1FoSBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:48:48.598112Z"},"content_sha256":"f4af1aa04f7e10977634129a1f4688046429380929fba837a7dd15b5700a55a9","schema_version":"1.0","event_id":"sha256:f4af1aa04f7e10977634129a1f4688046429380929fba837a7dd15b5700a55a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:XSYJMHP7UQL4YJ6G42OKN4L6VA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A universal approach for drainage basins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.comp-ph","authors_text":"Erneson A. Oliveira, Hans J. Herrmann, Jos\\'e S. Andrade Jr, Rilder S. Pires, Rubens S. Oliveira, Vasco Furtado","submitted_at":"2018-12-20T18:13:41Z","abstract_excerpt":"Drainage basins are essential to Geohydrology and Biodiversity. Defining those regions in a simple, robust and efficient way is a constant challenge in Earth Science. Here, we introduce a model to delineate multiple drainage basins through an extension of the Invasion Percolation-Based Algorithm (IPBA). In order to prove the potential of our approach, we apply it to real and artificial datasets. We observe that the perimeter and area distributions of basins and anti-basins display long tails extending over several orders of magnitude and following approximately power-law behaviors. Moreover, t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08737","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":"2026-05-17T23:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w6X/aWb+KhMfCZ7ZTK/s+MaF55n6FpHvFS2ls//M47FixPeN/gpf8BFw4rx/QrFJVMbWpIhMxmDYu7hXFeKtCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:48:48.598486Z"},"content_sha256":"9494eba76d1cc77779f24eed33bcc6be4326922c83d61671e4cd7ca23b276fa4","schema_version":"1.0","event_id":"sha256:9494eba76d1cc77779f24eed33bcc6be4326922c83d61671e4cd7ca23b276fa4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/bundle.json","state_url":"https://pith.science/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/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":"2026-05-28T06:48:48Z","links":{"resolver":"https://pith.science/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA","bundle":"https://pith.science/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/bundle.json","state":"https://pith.science/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XSYJMHP7UQL4YJ6G42OKN4L6VA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:XSYJMHP7UQL4YJ6G42OKN4L6VA","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":"ac1b5240ff9451f9530c89efb8cc5e140d1a26714f5975caa548493b6689e6d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-12-20T18:13:41Z","title_canon_sha256":"bcbec2f6205de0c02c973dd9326aba4dea476df45abedeb1e36bef55eab1fcc5"},"schema_version":"1.0","source":{"id":"1812.08737","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08737","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08737v2","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08737","created_at":"2026-05-17T23:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"XSYJMHP7UQL4","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XSYJMHP7UQL4YJ6G","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XSYJMHP7","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:9494eba76d1cc77779f24eed33bcc6be4326922c83d61671e4cd7ca23b276fa4","target":"graph","created_at":"2026-05-17T23:41:12Z","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":"Drainage basins are essential to Geohydrology and Biodiversity. Defining those regions in a simple, robust and efficient way is a constant challenge in Earth Science. Here, we introduce a model to delineate multiple drainage basins through an extension of the Invasion Percolation-Based Algorithm (IPBA). In order to prove the potential of our approach, we apply it to real and artificial datasets. We observe that the perimeter and area distributions of basins and anti-basins display long tails extending over several orders of magnitude and following approximately power-law behaviors. Moreover, t","authors_text":"Erneson A. Oliveira, Hans J. Herrmann, Jos\\'e S. Andrade Jr, Rilder S. Pires, Rubens S. Oliveira, Vasco Furtado","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-12-20T18:13:41Z","title":"A universal approach for drainage basins"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08737","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:f4af1aa04f7e10977634129a1f4688046429380929fba837a7dd15b5700a55a9","target":"record","created_at":"2026-05-17T23:41:12Z","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":"ac1b5240ff9451f9530c89efb8cc5e140d1a26714f5975caa548493b6689e6d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-12-20T18:13:41Z","title_canon_sha256":"bcbec2f6205de0c02c973dd9326aba4dea476df45abedeb1e36bef55eab1fcc5"},"schema_version":"1.0","source":{"id":"1812.08737","kind":"arxiv","version":2}},"canonical_sha256":"bcb0961dffa417cc27c6e69ca6f17ea830cda3c7c3184e11ccef59bcdebb625d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bcb0961dffa417cc27c6e69ca6f17ea830cda3c7c3184e11ccef59bcdebb625d","first_computed_at":"2026-05-17T23:41:12.423746Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:12.423746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OdZYZvMyRTwwHVk8bLHGFrgg+ppXq8pTHwV8Z/sKELl+cCcnKuXTrpe2mXSlYBgYv7wwzeHxUH/Rb9jZHogjDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:12.424178Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.08737","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4af1aa04f7e10977634129a1f4688046429380929fba837a7dd15b5700a55a9","sha256:9494eba76d1cc77779f24eed33bcc6be4326922c83d61671e4cd7ca23b276fa4"],"state_sha256":"c4c1e19932a97422d61a5e56625c63718700817e109cb6e531f621020d4f6d76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nSsMVEY3Jc9zl2bAW4SnmRWWjJR2HEWA80opnZo4IONY+442RUeyTxAvHrNeptClyswqK+aBcJ9CxjTpyMWsDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:48:48.600428Z","bundle_sha256":"0f385f3fc3bde63082c45a925965d57e6771c3ba8de59d340dfca7499f58391d"}}