{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ISDLSMOB3HKS62QWBOLFN66Q2P","short_pith_number":"pith:ISDLSMOB","canonical_record":{"source":{"id":"1708.01431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2017-08-04T09:37:05Z","cross_cats_sorted":[],"title_canon_sha256":"861b795d925d75abb6124c5b90c3306e428fca0402d7e2fae3a9f45645c3f32a","abstract_canon_sha256":"7b8a706dea38a8930f1262e3635c0e712a0ec5be7f1ea96d7b39f2d802c09ea3"},"schema_version":"1.0"},"canonical_sha256":"4486b931c1d9d52f6a160b9656fbd0d3fb272b0000d46ef92e95c1efe254d24f","source":{"kind":"arxiv","id":"1708.01431","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.01431","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1708.01431v1","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.01431","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"ISDLSMOB3HKS","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"ISDLSMOB3HKS62QW","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"ISDLSMOB","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ISDLSMOB3HKS62QWBOLFN66Q2P","target":"record","payload":{"canonical_record":{"source":{"id":"1708.01431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2017-08-04T09:37:05Z","cross_cats_sorted":[],"title_canon_sha256":"861b795d925d75abb6124c5b90c3306e428fca0402d7e2fae3a9f45645c3f32a","abstract_canon_sha256":"7b8a706dea38a8930f1262e3635c0e712a0ec5be7f1ea96d7b39f2d802c09ea3"},"schema_version":"1.0"},"canonical_sha256":"4486b931c1d9d52f6a160b9656fbd0d3fb272b0000d46ef92e95c1efe254d24f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:00.398403Z","signature_b64":"oblpoEkuMt9xMUL7Fu70H1zI0oWa+RGZG7g7rrBNaY8zpsxuCohaqzXI97xMknFT/b99LQZNJT9Z408cmtgHCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4486b931c1d9d52f6a160b9656fbd0d3fb272b0000d46ef92e95c1efe254d24f","last_reissued_at":"2026-05-18T00:01:00.397927Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:00.397927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.01431","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":"2026-05-18T00:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V/d7hbOdIMkL/XujNSIbgvlZNMpYPmoH1ngkUvTEsn/kVp18RujW3dPZwJWweVi2Ad3X6hkHeC97YZNDCo/eAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T00:33:41.281249Z"},"content_sha256":"f7b78331ba4c5676e66788419eb137ca9751a04b396b78bf9bb7338aa393a1e6","schema_version":"1.0","event_id":"sha256:f7b78331ba4c5676e66788419eb137ca9751a04b396b78bf9bb7338aa393a1e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ISDLSMOB3HKS62QWBOLFN66Q2P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Propagating speed waves in flocks: a mathematical model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Andrea Cavagna, Daniele Conti, Irene Giardina, Tomas S. Grigera","submitted_at":"2017-08-04T09:37:05Z","abstract_excerpt":"Efficient collective response to external perturbations is one of the most striking abilities of a biological system. Signal propagation through the group is an important condition for the imple- mentation of such a response. Information transfer has been experimentally observed in the turning mechanism of birds flocks. In this context it is well-known also the existence of density waves: birds under predation, attempting to escape, give rise to self-organized density waves that propagates linearly on the flock. Most aspects of this phenomenon are still not fully captured by theoretical models"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.01431","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":"2026-05-18T00:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oiRIZcSOS3G6nFnN/tfKbQZl1Wa+v+ZYZ9WC7n5cAKyf3oXojxH+nlsIHDIOzbMhEmy6vmqveFVYPGON1dhSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T00:33:41.281630Z"},"content_sha256":"ed31b6f7cc33ddcbc137ea28c7852c57a8a7862e9d0d26280a7fdad5c7800dd7","schema_version":"1.0","event_id":"sha256:ed31b6f7cc33ddcbc137ea28c7852c57a8a7862e9d0d26280a7fdad5c7800dd7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/bundle.json","state_url":"https://pith.science/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/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":"2026-05-21T00:33:41Z","links":{"resolver":"https://pith.science/pith/ISDLSMOB3HKS62QWBOLFN66Q2P","bundle":"https://pith.science/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/bundle.json","state":"https://pith.science/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ISDLSMOB3HKS62QWBOLFN66Q2P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ISDLSMOB3HKS62QWBOLFN66Q2P","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":"7b8a706dea38a8930f1262e3635c0e712a0ec5be7f1ea96d7b39f2d802c09ea3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2017-08-04T09:37:05Z","title_canon_sha256":"861b795d925d75abb6124c5b90c3306e428fca0402d7e2fae3a9f45645c3f32a"},"schema_version":"1.0","source":{"id":"1708.01431","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.01431","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1708.01431v1","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.01431","created_at":"2026-05-18T00:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"ISDLSMOB3HKS","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"ISDLSMOB3HKS62QW","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"ISDLSMOB","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:ed31b6f7cc33ddcbc137ea28c7852c57a8a7862e9d0d26280a7fdad5c7800dd7","target":"graph","created_at":"2026-05-18T00:01:00Z","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":"Efficient collective response to external perturbations is one of the most striking abilities of a biological system. Signal propagation through the group is an important condition for the imple- mentation of such a response. Information transfer has been experimentally observed in the turning mechanism of birds flocks. In this context it is well-known also the existence of density waves: birds under predation, attempting to escape, give rise to self-organized density waves that propagates linearly on the flock. Most aspects of this phenomenon are still not fully captured by theoretical models","authors_text":"Andrea Cavagna, Daniele Conti, Irene Giardina, Tomas S. Grigera","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2017-08-04T09:37:05Z","title":"Propagating speed waves in flocks: a mathematical model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.01431","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:f7b78331ba4c5676e66788419eb137ca9751a04b396b78bf9bb7338aa393a1e6","target":"record","created_at":"2026-05-18T00:01:00Z","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":"7b8a706dea38a8930f1262e3635c0e712a0ec5be7f1ea96d7b39f2d802c09ea3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2017-08-04T09:37:05Z","title_canon_sha256":"861b795d925d75abb6124c5b90c3306e428fca0402d7e2fae3a9f45645c3f32a"},"schema_version":"1.0","source":{"id":"1708.01431","kind":"arxiv","version":1}},"canonical_sha256":"4486b931c1d9d52f6a160b9656fbd0d3fb272b0000d46ef92e95c1efe254d24f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4486b931c1d9d52f6a160b9656fbd0d3fb272b0000d46ef92e95c1efe254d24f","first_computed_at":"2026-05-18T00:01:00.397927Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:00.397927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oblpoEkuMt9xMUL7Fu70H1zI0oWa+RGZG7g7rrBNaY8zpsxuCohaqzXI97xMknFT/b99LQZNJT9Z408cmtgHCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:00.398403Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.01431","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7b78331ba4c5676e66788419eb137ca9751a04b396b78bf9bb7338aa393a1e6","sha256:ed31b6f7cc33ddcbc137ea28c7852c57a8a7862e9d0d26280a7fdad5c7800dd7"],"state_sha256":"ea9b65a83871dfd78979323870021c516edd03fbce3c4afb25333ba0c26aa90d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BBMNKM0pMalpmmVNV1VoJpSO8OJ7CbXs6AabWp5a/01O/p0h/8l/7MDzmhuTlVZtjvPc7owZzSmmnqp+tqbgBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T00:33:41.284774Z","bundle_sha256":"fc83758ffc38f87fda337f137b2addad36c03d81851fa17daa465a2480a0dddb"}}