{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:OFGHFKDGLPU2ACFHAMUIMMM2ZW","short_pith_number":"pith:OFGHFKDG","canonical_record":{"source":{"id":"1211.6248","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2012-11-27T09:36:22Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"00d3f74b7ebddc6fde7ec6d27af3af14bd69435e50f2e40b9d688df34bb14c61","abstract_canon_sha256":"5f80242c3864ef423c8a37c1139ea3da2c09b5d34e6052a5fbec8146488cdb8a"},"schema_version":"1.0"},"canonical_sha256":"714c72a8665be9a008a7032886319acdbc621437d4f9a2b3731449e61f119dd9","source":{"kind":"arxiv","id":"1211.6248","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6248","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6248v2","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6248","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"pith_short_12","alias_value":"OFGHFKDGLPU2","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OFGHFKDGLPU2ACFH","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OFGHFKDG","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:OFGHFKDGLPU2ACFHAMUIMMM2ZW","target":"record","payload":{"canonical_record":{"source":{"id":"1211.6248","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2012-11-27T09:36:22Z","cross_cats_sorted":["stat.ML"],"title_canon_sha256":"00d3f74b7ebddc6fde7ec6d27af3af14bd69435e50f2e40b9d688df34bb14c61","abstract_canon_sha256":"5f80242c3864ef423c8a37c1139ea3da2c09b5d34e6052a5fbec8146488cdb8a"},"schema_version":"1.0"},"canonical_sha256":"714c72a8665be9a008a7032886319acdbc621437d4f9a2b3731449e61f119dd9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:39:15.956516Z","signature_b64":"b0qyFRlrdtCduFC0S9aW5SFUB2z5eWRTipvLvYaUJq0hqCTJhuEpqFyb1brCqOF3SL2wWk2PG/ntboh2W6teBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"714c72a8665be9a008a7032886319acdbc621437d4f9a2b3731449e61f119dd9","last_reissued_at":"2026-05-18T03:39:15.955591Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:39:15.955591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.6248","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":"2026-05-18T03:39:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+smbkH5MYxVwLw1Py2uZ5DVLa0o11EBsz5+yMS6femSNLQ5jb/sy4ZNerCjhJIx4NVN73SACxc1erjvENKYiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:15:37.005609Z"},"content_sha256":"70e9576f9301059f42e7052bd848e41d82e09cd4b1fa8c5c0a5df898d89c2e5a","schema_version":"1.0","event_id":"sha256:70e9576f9301059f42e7052bd848e41d82e09cd4b1fa8c5c0a5df898d89c2e5a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:OFGHFKDGLPU2ACFHAMUIMMM2ZW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A simple non-parametric Topic Mixture for Authors and Documents","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["stat.ML"],"primary_cat":"cs.LG","authors_text":"Arnim Bleier","submitted_at":"2012-11-27T09:36:22Z","abstract_excerpt":"This article reviews the Author-Topic Model and presents a new non-parametric extension based on the Hierarchical Dirichlet Process. The extension is especially suitable when no prior information about the number of components necessary is available. A blocked Gibbs sampler is described and focus put on staying as close as possible to the original model with only the minimum of theoretical and implementation overhead necessary."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6248","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":"2026-05-18T03:39:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oBBpXxuAa3HLPLYIJvDI4aZwweogiuL5FAe6nor1lxO/EJlZ4yowAXzC9/zDmiNSvdGl7iHm1Q5DEN3vKawZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:15:37.005994Z"},"content_sha256":"ac2979266da3c772b25f9cd42a6b5db60ff6f4766ba8b497e54a0dbfa260b974","schema_version":"1.0","event_id":"sha256:ac2979266da3c772b25f9cd42a6b5db60ff6f4766ba8b497e54a0dbfa260b974"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/bundle.json","state_url":"https://pith.science/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/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":"2026-06-06T19:15:37Z","links":{"resolver":"https://pith.science/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW","bundle":"https://pith.science/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/bundle.json","state":"https://pith.science/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OFGHFKDGLPU2ACFHAMUIMMM2ZW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OFGHFKDGLPU2ACFHAMUIMMM2ZW","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":"5f80242c3864ef423c8a37c1139ea3da2c09b5d34e6052a5fbec8146488cdb8a","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2012-11-27T09:36:22Z","title_canon_sha256":"00d3f74b7ebddc6fde7ec6d27af3af14bd69435e50f2e40b9d688df34bb14c61"},"schema_version":"1.0","source":{"id":"1211.6248","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6248","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6248v2","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6248","created_at":"2026-05-18T03:39:15Z"},{"alias_kind":"pith_short_12","alias_value":"OFGHFKDGLPU2","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OFGHFKDGLPU2ACFH","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OFGHFKDG","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:ac2979266da3c772b25f9cd42a6b5db60ff6f4766ba8b497e54a0dbfa260b974","target":"graph","created_at":"2026-05-18T03:39:15Z","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":"This article reviews the Author-Topic Model and presents a new non-parametric extension based on the Hierarchical Dirichlet Process. The extension is especially suitable when no prior information about the number of components necessary is available. A blocked Gibbs sampler is described and focus put on staying as close as possible to the original model with only the minimum of theoretical and implementation overhead necessary.","authors_text":"Arnim Bleier","cross_cats":["stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2012-11-27T09:36:22Z","title":"A simple non-parametric Topic Mixture for Authors and Documents"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6248","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":"sha256:70e9576f9301059f42e7052bd848e41d82e09cd4b1fa8c5c0a5df898d89c2e5a","target":"record","created_at":"2026-05-18T03:39:15Z","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":"5f80242c3864ef423c8a37c1139ea3da2c09b5d34e6052a5fbec8146488cdb8a","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2012-11-27T09:36:22Z","title_canon_sha256":"00d3f74b7ebddc6fde7ec6d27af3af14bd69435e50f2e40b9d688df34bb14c61"},"schema_version":"1.0","source":{"id":"1211.6248","kind":"arxiv","version":2}},"canonical_sha256":"714c72a8665be9a008a7032886319acdbc621437d4f9a2b3731449e61f119dd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"714c72a8665be9a008a7032886319acdbc621437d4f9a2b3731449e61f119dd9","first_computed_at":"2026-05-18T03:39:15.955591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:39:15.955591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b0qyFRlrdtCduFC0S9aW5SFUB2z5eWRTipvLvYaUJq0hqCTJhuEpqFyb1brCqOF3SL2wWk2PG/ntboh2W6teBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:39:15.956516Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.6248","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70e9576f9301059f42e7052bd848e41d82e09cd4b1fa8c5c0a5df898d89c2e5a","sha256:ac2979266da3c772b25f9cd42a6b5db60ff6f4766ba8b497e54a0dbfa260b974"],"state_sha256":"5d492279e4e0d162c9584f8316a35e11888288726d7812bbc3d90998602c115d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5PEhZANz1/4TPysodp90gw8/zxAi6uMpznTNgidmbxZZpdikQ2U5R2+5adTomvTHyx8FUYGqAjoFcaQz5xNxDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:15:37.009564Z","bundle_sha256":"c324690625451d5cdf1bd3fd6f7eab0d79eebe561fc8b8209711aa4ac477f49d"}}