{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:O2FCMP2UDXRMBRLRI53OAGFB67","short_pith_number":"pith:O2FCMP2U","canonical_record":{"source":{"id":"1406.3183","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2014-06-12T10:19:07Z","cross_cats_sorted":[],"title_canon_sha256":"b6c22dd8373d06cb4896a60d60ca63ed99a1e80d315a0362bb068c611f75fda8","abstract_canon_sha256":"938961c8175d93d2e76621f78a18a2bd535530e6af738b1542a877e4d7dea4dd"},"schema_version":"1.0"},"canonical_sha256":"768a263f541de2c0c5714776e018a1f7c2438200f3a507f71d8a10fad2db65bc","source":{"kind":"arxiv","id":"1406.3183","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.3183","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"arxiv_version","alias_value":"1406.3183v3","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.3183","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"pith_short_12","alias_value":"O2FCMP2UDXRM","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"O2FCMP2UDXRMBRLR","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"O2FCMP2U","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:O2FCMP2UDXRMBRLRI53OAGFB67","target":"record","payload":{"canonical_record":{"source":{"id":"1406.3183","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2014-06-12T10:19:07Z","cross_cats_sorted":[],"title_canon_sha256":"b6c22dd8373d06cb4896a60d60ca63ed99a1e80d315a0362bb068c611f75fda8","abstract_canon_sha256":"938961c8175d93d2e76621f78a18a2bd535530e6af738b1542a877e4d7dea4dd"},"schema_version":"1.0"},"canonical_sha256":"768a263f541de2c0c5714776e018a1f7c2438200f3a507f71d8a10fad2db65bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:32:38.647571Z","signature_b64":"JsIjvWyDyQH+b/e2eOv8Ikb1M17axIdVA02VoI8TN+YT/hc8zGZhZOmtR/U4igYlrpxB4QQZDIIWGamCD+OaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"768a263f541de2c0c5714776e018a1f7c2438200f3a507f71d8a10fad2db65bc","last_reissued_at":"2026-05-18T02:32:38.647099Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:32:38.647099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.3183","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:32:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2jffh7WtOyAxDoQLN0ckv0ZXdb0tJlA1ICUXZdIo3wXlDjTu2I8tCE5hLAK1mJVWd4I/uuNhQzkIsiG+ogFvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:54:21.096120Z"},"content_sha256":"7b625eaabad5579266cb8ebf80c9b23ab7969e7a7d2ee913f59a6d52209dbb61","schema_version":"1.0","event_id":"sha256:7b625eaabad5579266cb8ebf80c9b23ab7969e7a7d2ee913f59a6d52209dbb61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:O2FCMP2UDXRMBRLRI53OAGFB67","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Approximations of the Optimal Importance Density using Gaussian Particle Flow Importance Sampling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.CO","authors_text":"Pete Bunch, Simon Godsill","submitted_at":"2014-06-12T10:19:07Z","abstract_excerpt":"Recently developed particle flow algorithms provide an alternative to importance sampling for drawing particles from a posterior distribution, and a number of particle filters based on this principle have been proposed. Samples are drawn from the prior and then moved according to some dynamics over an interval of pseudo-time such that their final values are distributed according to the desired posterior. In practice, implementing a particle flow sampler requires multiple layers of approximation, with the result that the final samples do not in general have the correct posterior distribution. I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.3183","kind":"arxiv","version":3},"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":"2026-05-18T02:32:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UTRWvmzOTw6ulgeatdZCscVKLOGLcweopUhPs+wGH/hyBlRlssot72ght+hBmh8L+9moo7iRk8x91ejmb7bOBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:54:21.096627Z"},"content_sha256":"553e6a4ffba6b19762752e4e419996cbdcac35447ff80bd9ff7f5977246bbdac","schema_version":"1.0","event_id":"sha256:553e6a4ffba6b19762752e4e419996cbdcac35447ff80bd9ff7f5977246bbdac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O2FCMP2UDXRMBRLRI53OAGFB67/bundle.json","state_url":"https://pith.science/pith/O2FCMP2UDXRMBRLRI53OAGFB67/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O2FCMP2UDXRMBRLRI53OAGFB67/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":"2026-06-11T05:54:21Z","links":{"resolver":"https://pith.science/pith/O2FCMP2UDXRMBRLRI53OAGFB67","bundle":"https://pith.science/pith/O2FCMP2UDXRMBRLRI53OAGFB67/bundle.json","state":"https://pith.science/pith/O2FCMP2UDXRMBRLRI53OAGFB67/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O2FCMP2UDXRMBRLRI53OAGFB67/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:O2FCMP2UDXRMBRLRI53OAGFB67","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":"938961c8175d93d2e76621f78a18a2bd535530e6af738b1542a877e4d7dea4dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2014-06-12T10:19:07Z","title_canon_sha256":"b6c22dd8373d06cb4896a60d60ca63ed99a1e80d315a0362bb068c611f75fda8"},"schema_version":"1.0","source":{"id":"1406.3183","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.3183","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"arxiv_version","alias_value":"1406.3183v3","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.3183","created_at":"2026-05-18T02:32:38Z"},{"alias_kind":"pith_short_12","alias_value":"O2FCMP2UDXRM","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"O2FCMP2UDXRMBRLR","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"O2FCMP2U","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:553e6a4ffba6b19762752e4e419996cbdcac35447ff80bd9ff7f5977246bbdac","target":"graph","created_at":"2026-05-18T02:32:38Z","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 particle flow algorithms provide an alternative to importance sampling for drawing particles from a posterior distribution, and a number of particle filters based on this principle have been proposed. Samples are drawn from the prior and then moved according to some dynamics over an interval of pseudo-time such that their final values are distributed according to the desired posterior. In practice, implementing a particle flow sampler requires multiple layers of approximation, with the result that the final samples do not in general have the correct posterior distribution. I","authors_text":"Pete Bunch, Simon Godsill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2014-06-12T10:19:07Z","title":"Approximations of the Optimal Importance Density using Gaussian Particle Flow Importance Sampling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.3183","kind":"arxiv","version":3},"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":"sha256:7b625eaabad5579266cb8ebf80c9b23ab7969e7a7d2ee913f59a6d52209dbb61","target":"record","created_at":"2026-05-18T02:32:38Z","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":"938961c8175d93d2e76621f78a18a2bd535530e6af738b1542a877e4d7dea4dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2014-06-12T10:19:07Z","title_canon_sha256":"b6c22dd8373d06cb4896a60d60ca63ed99a1e80d315a0362bb068c611f75fda8"},"schema_version":"1.0","source":{"id":"1406.3183","kind":"arxiv","version":3}},"canonical_sha256":"768a263f541de2c0c5714776e018a1f7c2438200f3a507f71d8a10fad2db65bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"768a263f541de2c0c5714776e018a1f7c2438200f3a507f71d8a10fad2db65bc","first_computed_at":"2026-05-18T02:32:38.647099Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:32:38.647099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JsIjvWyDyQH+b/e2eOv8Ikb1M17axIdVA02VoI8TN+YT/hc8zGZhZOmtR/U4igYlrpxB4QQZDIIWGamCD+OaAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:32:38.647571Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.3183","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b625eaabad5579266cb8ebf80c9b23ab7969e7a7d2ee913f59a6d52209dbb61","sha256:553e6a4ffba6b19762752e4e419996cbdcac35447ff80bd9ff7f5977246bbdac"],"state_sha256":"24885ed2a64cd6d1accfadc75bfa170a7a2664b89feb58361dad9543a5f3e286"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t/ggYxbLz6YcXE3PiHvZNNsWkbp+IDIKnvPjnjNo9rwyOGWMPz72N0mTkog9bylQowhzWWVjyBUIdS1kOxN8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T05:54:21.100297Z","bundle_sha256":"4bd50098e07565ac5ede34a237585fa669c201dd36714d84d097ead1780ddc7b"}}