{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:7V4MLPF723WY7D63Y5GNRL36RN","short_pith_number":"pith:7V4MLPF7","canonical_record":{"source":{"id":"1203.0535","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2012-03-02T17:56:29Z","cross_cats_sorted":["cs.CY","physics.soc-ph"],"title_canon_sha256":"f6978ff1bfad99085fc0737e1d8a6621bc2dde429a9e311ecc1f2887cbc65b4d","abstract_canon_sha256":"15f401b72c304db8e2ab4116a9db8bb2455b9a89ecab58a18a86c82e6d8f3a94"},"schema_version":"1.0"},"canonical_sha256":"fd78c5bcbfd6ed8f8fdbc74cd8af7e8b6b2707b9d3582bc449dfe941de32d0df","source":{"kind":"arxiv","id":"1203.0535","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0535","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0535v2","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0535","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"pith_short_12","alias_value":"7V4MLPF723WY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7V4MLPF723WY7D63","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7V4MLPF7","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:7V4MLPF723WY7D63Y5GNRL36RN","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0535","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2012-03-02T17:56:29Z","cross_cats_sorted":["cs.CY","physics.soc-ph"],"title_canon_sha256":"f6978ff1bfad99085fc0737e1d8a6621bc2dde429a9e311ecc1f2887cbc65b4d","abstract_canon_sha256":"15f401b72c304db8e2ab4116a9db8bb2455b9a89ecab58a18a86c82e6d8f3a94"},"schema_version":"1.0"},"canonical_sha256":"fd78c5bcbfd6ed8f8fdbc74cd8af7e8b6b2707b9d3582bc449dfe941de32d0df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:38:53.358510Z","signature_b64":"j1lK59rZNatVe22AKLL+TVVu5XHzpsUk3nxVgtQKHYUPTw6VMXr6VX9YstHBnH5E/1hBD2O2VgevxWBVDO7fBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd78c5bcbfd6ed8f8fdbc74cd8af7e8b6b2707b9d3582bc449dfe941de32d0df","last_reissued_at":"2026-05-18T02:38:53.358107Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:38:53.358107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0535","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":"2026-05-18T02:38:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qH7YfaEEHGMWAhARSWI/0EEgPZkQ53hlKgcGMSJZAdhLuTEFYs34oJlrNPeo6JiR2OzIgi1doGpcxdVMF3raCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:41:38.906690Z"},"content_sha256":"2baed68f905e5f8550a036d3f5dd400b909f9c553e4145f34a8ac59c8118e456","schema_version":"1.0","event_id":"sha256:2baed68f905e5f8550a036d3f5dd400b909f9c553e4145f34a8ac59c8118e456"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:7V4MLPF723WY7D63Y5GNRL36RN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Facebook, most ties are weak","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CY","physics.soc-ph"],"primary_cat":"cs.SI","authors_text":"Alessandro Provetti, Emilio Ferrara, Giacomo Fiumara, Pasquale De Meo","submitted_at":"2012-03-02T17:56:29Z","abstract_excerpt":"Pervasive socio-technical networks bring new conceptual and technological challenges to developers and users alike. A central research theme is evaluation of the intensity of relations linking users and how they facilitate communication and the spread of information. These aspects of human relationships have been studied extensively in the social sciences under the framework of the \"strength of weak ties\" theory proposed by Mark Granovetter.13 Some research has considered whether that theory can be extended to online social networks like Facebook, suggesting interaction data can be used to pre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0535","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":"2026-05-18T02:38:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eRZbKlLjuZL/mIwFpvEXcPFGLfbT/lSaaUCOzHQvztsYDOjQ0yC1GeWE5Hkyc1d+Shn19PJJVijKjbJfoiFBCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:41:38.907168Z"},"content_sha256":"a9c55544004bcfe441f118bd5fde066243f1092bedf87c82700580fb9d67d337","schema_version":"1.0","event_id":"sha256:a9c55544004bcfe441f118bd5fde066243f1092bedf87c82700580fb9d67d337"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7V4MLPF723WY7D63Y5GNRL36RN/bundle.json","state_url":"https://pith.science/pith/7V4MLPF723WY7D63Y5GNRL36RN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7V4MLPF723WY7D63Y5GNRL36RN/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":"2026-05-25T19:41:38Z","links":{"resolver":"https://pith.science/pith/7V4MLPF723WY7D63Y5GNRL36RN","bundle":"https://pith.science/pith/7V4MLPF723WY7D63Y5GNRL36RN/bundle.json","state":"https://pith.science/pith/7V4MLPF723WY7D63Y5GNRL36RN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7V4MLPF723WY7D63Y5GNRL36RN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7V4MLPF723WY7D63Y5GNRL36RN","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":"15f401b72c304db8e2ab4116a9db8bb2455b9a89ecab58a18a86c82e6d8f3a94","cross_cats_sorted":["cs.CY","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2012-03-02T17:56:29Z","title_canon_sha256":"f6978ff1bfad99085fc0737e1d8a6621bc2dde429a9e311ecc1f2887cbc65b4d"},"schema_version":"1.0","source":{"id":"1203.0535","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0535","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0535v2","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0535","created_at":"2026-05-18T02:38:53Z"},{"alias_kind":"pith_short_12","alias_value":"7V4MLPF723WY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7V4MLPF723WY7D63","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7V4MLPF7","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:a9c55544004bcfe441f118bd5fde066243f1092bedf87c82700580fb9d67d337","target":"graph","created_at":"2026-05-18T02:38:53Z","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":"Pervasive socio-technical networks bring new conceptual and technological challenges to developers and users alike. A central research theme is evaluation of the intensity of relations linking users and how they facilitate communication and the spread of information. These aspects of human relationships have been studied extensively in the social sciences under the framework of the \"strength of weak ties\" theory proposed by Mark Granovetter.13 Some research has considered whether that theory can be extended to online social networks like Facebook, suggesting interaction data can be used to pre","authors_text":"Alessandro Provetti, Emilio Ferrara, Giacomo Fiumara, Pasquale De Meo","cross_cats":["cs.CY","physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2012-03-02T17:56:29Z","title":"On Facebook, most ties are weak"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0535","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":"sha256:2baed68f905e5f8550a036d3f5dd400b909f9c553e4145f34a8ac59c8118e456","target":"record","created_at":"2026-05-18T02:38:53Z","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":"15f401b72c304db8e2ab4116a9db8bb2455b9a89ecab58a18a86c82e6d8f3a94","cross_cats_sorted":["cs.CY","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2012-03-02T17:56:29Z","title_canon_sha256":"f6978ff1bfad99085fc0737e1d8a6621bc2dde429a9e311ecc1f2887cbc65b4d"},"schema_version":"1.0","source":{"id":"1203.0535","kind":"arxiv","version":2}},"canonical_sha256":"fd78c5bcbfd6ed8f8fdbc74cd8af7e8b6b2707b9d3582bc449dfe941de32d0df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd78c5bcbfd6ed8f8fdbc74cd8af7e8b6b2707b9d3582bc449dfe941de32d0df","first_computed_at":"2026-05-18T02:38:53.358107Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:38:53.358107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j1lK59rZNatVe22AKLL+TVVu5XHzpsUk3nxVgtQKHYUPTw6VMXr6VX9YstHBnH5E/1hBD2O2VgevxWBVDO7fBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:38:53.358510Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0535","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2baed68f905e5f8550a036d3f5dd400b909f9c553e4145f34a8ac59c8118e456","sha256:a9c55544004bcfe441f118bd5fde066243f1092bedf87c82700580fb9d67d337"],"state_sha256":"b3f1ca1cfde8654a6aa9406f1122d9c707b610ba57bf3686ee80e41fefe7e834"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nej4sUnuHB2yerEkWypr17PNgBuwKMC41iXC3iaJ4AtMfWXU7pUolr6SMYMfw4OfQcGMQb9rFGSGiO4PdTFtAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:41:38.910298Z","bundle_sha256":"995cf0e5e133710c6a31d3e776200572d73ac1fe06c803ce8abba7df3a23c428"}}