{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:XDBHMNNFEYFTBZRHL3A6YLVF2B","short_pith_number":"pith:XDBHMNNF","canonical_record":{"source":{"id":"physics/0611268","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.soc-ph","submitted_at":"2006-11-27T18:50:39Z","cross_cats_sorted":[],"title_canon_sha256":"074af2a85c6bfd103cea1ca387c70d51ff53ee94674664e2c241dd297d514333","abstract_canon_sha256":"9c22cf1baa0549042c4beb16cf1b977bce1867f21afc562191e85c58e1c5de6c"},"schema_version":"1.0"},"canonical_sha256":"b8c27635a5260b30e6275ec1ec2ea5d07c9068d6b60c24d45da3f83617aacc58","source":{"kind":"arxiv","id":"physics/0611268","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0611268","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0611268v1","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0611268","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"pith_short_12","alias_value":"XDBHMNNFEYFT","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"XDBHMNNFEYFTBZRH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"XDBHMNNF","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:XDBHMNNFEYFTBZRHL3A6YLVF2B","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0611268","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.soc-ph","submitted_at":"2006-11-27T18:50:39Z","cross_cats_sorted":[],"title_canon_sha256":"074af2a85c6bfd103cea1ca387c70d51ff53ee94674664e2c241dd297d514333","abstract_canon_sha256":"9c22cf1baa0549042c4beb16cf1b977bce1867f21afc562191e85c58e1c5de6c"},"schema_version":"1.0"},"canonical_sha256":"b8c27635a5260b30e6275ec1ec2ea5d07c9068d6b60c24d45da3f83617aacc58","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:38:04.931361Z","signature_b64":"C2PHHA+5xLDWw42LSbbshQD2kri6jYtcQrWhTEzfNR1g/W1gxGLLfmywbvgWlyJSnZ7PH3NezYViPVHK12D1Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8c27635a5260b30e6275ec1ec2ea5d07c9068d6b60c24d45da3f83617aacc58","last_reissued_at":"2026-05-18T01:38:04.930814Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:38:04.930814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0611268","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":"2026-05-18T01:38:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W9H/SHVXlU3Bn80ruSCbvGQT5goU1N2VMbredcweX/2O3h86Eqc4cvRpNFgwgBad1HPKgBop7Dotj3+59/OXBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:22:32.857425Z"},"content_sha256":"8460d339927a32cc5a674066bc273741bd37f23419a3a2a4a7a98c199fa397c9","schema_version":"1.0","event_id":"sha256:8460d339927a32cc5a674066bc273741bd37f23419a3a2a4a7a98c199fa397c9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:XDBHMNNFEYFTBZRHL3A6YLVF2B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Community structure and ethnic preferences in school friendship networks","license":"","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"H. J. Herrmann, J. Kertesz, M. C. Gonzalez, T. Vicsek","submitted_at":"2006-11-27T18:50:39Z","abstract_excerpt":"Recently developed concepts and techniques of analyzing complex systems provide new insight into the structure of social networks. Uncovering recurrent preferences and organizational principles in such networks is a key issue to characterize them. We investigate school friendship networks from the Add Health database. Applying threshold analysis, we find that the friendship networks do not form a single connected component through mutual strong nominations within a school, while under weaker conditions such interconnectedness is present. We extract the networks of overlapping communities at th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0611268","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":"2026-05-18T01:38:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IBL6O8xwm0eBYC0EOOiSVBr3Kzgj+qS/t8kCWipd4I7iHDXee+ej4GpWITrLQg7uH91CG3vlAj9Rrn7mWPslCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:22:32.857771Z"},"content_sha256":"8a764322c14d86ded02f09c030f8f440b7b52fe9cb70bc233ad844d52a327ce0","schema_version":"1.0","event_id":"sha256:8a764322c14d86ded02f09c030f8f440b7b52fe9cb70bc233ad844d52a327ce0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/bundle.json","state_url":"https://pith.science/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/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":"2026-06-03T14:22:32Z","links":{"resolver":"https://pith.science/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B","bundle":"https://pith.science/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/bundle.json","state":"https://pith.science/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XDBHMNNFEYFTBZRHL3A6YLVF2B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:XDBHMNNFEYFTBZRHL3A6YLVF2B","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":"9c22cf1baa0549042c4beb16cf1b977bce1867f21afc562191e85c58e1c5de6c","cross_cats_sorted":[],"license":"","primary_cat":"physics.soc-ph","submitted_at":"2006-11-27T18:50:39Z","title_canon_sha256":"074af2a85c6bfd103cea1ca387c70d51ff53ee94674664e2c241dd297d514333"},"schema_version":"1.0","source":{"id":"physics/0611268","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0611268","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0611268v1","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0611268","created_at":"2026-05-18T01:38:04Z"},{"alias_kind":"pith_short_12","alias_value":"XDBHMNNFEYFT","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"XDBHMNNFEYFTBZRH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"XDBHMNNF","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:8a764322c14d86ded02f09c030f8f440b7b52fe9cb70bc233ad844d52a327ce0","target":"graph","created_at":"2026-05-18T01:38:04Z","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":"Recently developed concepts and techniques of analyzing complex systems provide new insight into the structure of social networks. Uncovering recurrent preferences and organizational principles in such networks is a key issue to characterize them. We investigate school friendship networks from the Add Health database. Applying threshold analysis, we find that the friendship networks do not form a single connected component through mutual strong nominations within a school, while under weaker conditions such interconnectedness is present. We extract the networks of overlapping communities at th","authors_text":"H. J. Herrmann, J. Kertesz, M. C. Gonzalez, T. Vicsek","cross_cats":[],"headline":"","license":"","primary_cat":"physics.soc-ph","submitted_at":"2006-11-27T18:50:39Z","title":"Community structure and ethnic preferences in school friendship networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0611268","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":"sha256:8460d339927a32cc5a674066bc273741bd37f23419a3a2a4a7a98c199fa397c9","target":"record","created_at":"2026-05-18T01:38:04Z","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":"9c22cf1baa0549042c4beb16cf1b977bce1867f21afc562191e85c58e1c5de6c","cross_cats_sorted":[],"license":"","primary_cat":"physics.soc-ph","submitted_at":"2006-11-27T18:50:39Z","title_canon_sha256":"074af2a85c6bfd103cea1ca387c70d51ff53ee94674664e2c241dd297d514333"},"schema_version":"1.0","source":{"id":"physics/0611268","kind":"arxiv","version":1}},"canonical_sha256":"b8c27635a5260b30e6275ec1ec2ea5d07c9068d6b60c24d45da3f83617aacc58","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8c27635a5260b30e6275ec1ec2ea5d07c9068d6b60c24d45da3f83617aacc58","first_computed_at":"2026-05-18T01:38:04.930814Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:38:04.930814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C2PHHA+5xLDWw42LSbbshQD2kri6jYtcQrWhTEzfNR1g/W1gxGLLfmywbvgWlyJSnZ7PH3NezYViPVHK12D1Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:38:04.931361Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0611268","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8460d339927a32cc5a674066bc273741bd37f23419a3a2a4a7a98c199fa397c9","sha256:8a764322c14d86ded02f09c030f8f440b7b52fe9cb70bc233ad844d52a327ce0"],"state_sha256":"c149ba3101f3ed7a6ab5a34e4a0a0dae3380fce7e41249314a8a0e58aa063bb5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ThlMGd7syknb4+OCz08T+K5INFelniLaBHT9bDUMY3FaPElTM6lfU+SmKhRRtYw2xuvW2kJeJfDt7YC/WtXGDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:22:32.859705Z","bundle_sha256":"5afcab6d819484dc1f17ac133409e291cae98eb00ee2d58fa4238163558beef3"}}