{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:3JRMRDBSNPIUIASTI3Y4WQP3MM","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":"2b3af4b2b0b824abace6ebae2f2bb9afbf030fa41e67be46ab65c81950a7099f","cross_cats_sorted":["cs.CL","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-10T08:41:35Z","title_canon_sha256":"fca7d7cf836d578418c9486aae9f4b9c13de2552c561ce8e2d457e4354b61037"},"schema_version":"1.0","source":{"id":"1409.2993","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2993","created_at":"2026-05-18T02:43:08Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2993v1","created_at":"2026-05-18T02:43:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2993","created_at":"2026-05-18T02:43:08Z"},{"alias_kind":"pith_short_12","alias_value":"3JRMRDBSNPIU","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3JRMRDBSNPIUIAST","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3JRMRDBS","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:45799fa438efe09801d1f70ec1610f9e25d8704bfcee78eb7a71cdd6de0bf804","target":"graph","created_at":"2026-05-18T02:43:08Z","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":"It has always been a burden to the users of statistical topic models to predetermine the right number of topics, which is a key parameter of most topic models. Conventionally, automatic selection of this parameter is done through either statistical model selection (e.g., cross-validation, AIC, or BIC) or Bayesian nonparametric models (e.g., hierarchical Dirichlet process). These methods either rely on repeated runs of the inference algorithm to search through a large range of parameter values which does not suit the mining of big data, or replace this parameter with alternative parameters that","authors_text":"Jian Tang, Ming Zhang, Qiaozhu Mei","cross_cats":["cs.CL","cs.IR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-10T08:41:35Z","title":"\"Look Ma, No Hands!\" A Parameter-Free Topic Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2993","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":"sha256:29e6f5ca3570b607cb241f22e5b3834679636bae29bec54a6f3df35ce4afe5a4","target":"record","created_at":"2026-05-18T02:43:08Z","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":"2b3af4b2b0b824abace6ebae2f2bb9afbf030fa41e67be46ab65c81950a7099f","cross_cats_sorted":["cs.CL","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-10T08:41:35Z","title_canon_sha256":"fca7d7cf836d578418c9486aae9f4b9c13de2552c561ce8e2d457e4354b61037"},"schema_version":"1.0","source":{"id":"1409.2993","kind":"arxiv","version":1}},"canonical_sha256":"da62c88c326bd144025346f1cb41fb6312765802c95d8bdcb4c42a277511b7b9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"da62c88c326bd144025346f1cb41fb6312765802c95d8bdcb4c42a277511b7b9","first_computed_at":"2026-05-18T02:43:08.554115Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:08.554115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZjLo8cwMYvsESk//GqoHseoWV1XG0inc8PsMI4LmBT85+ItPGlrk0G5XMxmfavs0L6CvSrdWbIvBBGeRycz+Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:08.554695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.2993","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29e6f5ca3570b607cb241f22e5b3834679636bae29bec54a6f3df35ce4afe5a4","sha256:45799fa438efe09801d1f70ec1610f9e25d8704bfcee78eb7a71cdd6de0bf804"],"state_sha256":"29126c2c73acb5cdb57e3654e9210616a35df86d57dd72335535f744b2aad9f9"}