{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:O4I62ZWS4F5N2KFO6JEOACPBJP","short_pith_number":"pith:O4I62ZWS","canonical_record":{"source":{"id":"2509.09785","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-09-11T18:33:40Z","cross_cats_sorted":[],"title_canon_sha256":"13a209d60ae0697949eb06177d915b43aabd6dd9d359166db6db12a2561cdad0","abstract_canon_sha256":"b12a93e087908080604a78f2bee94461fe6d3473ca6caab740105e65dcf8d9cf"},"schema_version":"1.0"},"canonical_sha256":"7711ed66d2e17add28aef248e009e14bed7f8dd913308c48724ecf783cd5a31c","source":{"kind":"arxiv","id":"2509.09785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.09785","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"2509.09785v1","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.09785","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"O4I62ZWS4F5N","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"O4I62ZWS4F5N2KFO","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"O4I62ZWS","created_at":"2026-07-05T12:09:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:O4I62ZWS4F5N2KFO6JEOACPBJP","target":"record","payload":{"canonical_record":{"source":{"id":"2509.09785","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-09-11T18:33:40Z","cross_cats_sorted":[],"title_canon_sha256":"13a209d60ae0697949eb06177d915b43aabd6dd9d359166db6db12a2561cdad0","abstract_canon_sha256":"b12a93e087908080604a78f2bee94461fe6d3473ca6caab740105e65dcf8d9cf"},"schema_version":"1.0"},"canonical_sha256":"7711ed66d2e17add28aef248e009e14bed7f8dd913308c48724ecf783cd5a31c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:09:49.288505Z","signature_b64":"2++7icxnjmtqTJk7BDDR85uwlltsAq/lYv+Q6OM6bG6DpP+17BcgNO299LlnyyZXYpGmnfF0LtHIZn3EsbkoAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7711ed66d2e17add28aef248e009e14bed7f8dd913308c48724ecf783cd5a31c","last_reissued_at":"2026-07-05T12:09:49.287989Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:09:49.287989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.09785","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":"2026-07-05T12:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7uXasoAn+Pqh2Mc6rL4uP0NUoRQRYiRk3G4tiZMHLcgKYzALpDnm895+p8BjcwSZ1vOpNa+TDzjNNy6KmKESBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T02:20:35.756626Z"},"content_sha256":"2f9f5369134f892af4c282ef06fbb535f4eddf1cc051e4184fbc9d2511732343","schema_version":"1.0","event_id":"sha256:2f9f5369134f892af4c282ef06fbb535f4eddf1cc051e4184fbc9d2511732343"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:O4I62ZWS4F5N2KFO6JEOACPBJP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Purge-Gate: Backpropagation-Free Test-Time Adaptation for Point Clouds Classification via Token Purging","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ali Bahri, Christian Desrosiers, David Osowiechi, Gustavo Adolfo Vargas Hakim, Ismail Ben Ayed, Mehrdad Noori, Moslem Yazdanpanah, Sahar Dastani","submitted_at":"2025-09-11T18:33:40Z","abstract_excerpt":"Test-time adaptation (TTA) is crucial for mitigating performance degradation caused by distribution shifts in 3D point cloud classification. In this work, we introduce Token Purging (PG), a novel backpropagation-free approach that removes tokens highly affected by domain shifts before they reach attention layers. Unlike existing TTA methods, PG operates at the token level, ensuring robust adaptation without iterative updates. We propose two variants: PG-SP, which leverages source statistics, and PG-SF, a fully source-free version relying on CLS-token-driven adaptation. Extensive evaluations on"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.09785","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2509.09785/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T12:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lV4BV5dqZ1mXkn6DHNQiS8WF8Mi0jla5pGpLBPBrspaawUO7AWN/5OO9w7di6taVPmw332cDxTGac2pDxKUMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T02:20:35.757019Z"},"content_sha256":"f29fcfcc8903804a650972f0d9424e68140dfa1b2e6ec01aca4b1f44a31ca759","schema_version":"1.0","event_id":"sha256:f29fcfcc8903804a650972f0d9424e68140dfa1b2e6ec01aca4b1f44a31ca759"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/bundle.json","state_url":"https://pith.science/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/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":"2026-08-18T02:20:35Z","links":{"resolver":"https://pith.science/pith/O4I62ZWS4F5N2KFO6JEOACPBJP","bundle":"https://pith.science/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/bundle.json","state":"https://pith.science/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O4I62ZWS4F5N2KFO6JEOACPBJP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:O4I62ZWS4F5N2KFO6JEOACPBJP","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":"b12a93e087908080604a78f2bee94461fe6d3473ca6caab740105e65dcf8d9cf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-09-11T18:33:40Z","title_canon_sha256":"13a209d60ae0697949eb06177d915b43aabd6dd9d359166db6db12a2561cdad0"},"schema_version":"1.0","source":{"id":"2509.09785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.09785","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"2509.09785v1","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.09785","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"O4I62ZWS4F5N","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"O4I62ZWS4F5N2KFO","created_at":"2026-07-05T12:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"O4I62ZWS","created_at":"2026-07-05T12:09:49Z"}],"graph_snapshots":[{"event_id":"sha256:f29fcfcc8903804a650972f0d9424e68140dfa1b2e6ec01aca4b1f44a31ca759","target":"graph","created_at":"2026-07-05T12:09:49Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2509.09785/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Test-time adaptation (TTA) is crucial for mitigating performance degradation caused by distribution shifts in 3D point cloud classification. In this work, we introduce Token Purging (PG), a novel backpropagation-free approach that removes tokens highly affected by domain shifts before they reach attention layers. Unlike existing TTA methods, PG operates at the token level, ensuring robust adaptation without iterative updates. We propose two variants: PG-SP, which leverages source statistics, and PG-SF, a fully source-free version relying on CLS-token-driven adaptation. Extensive evaluations on","authors_text":"Ali Bahri, Christian Desrosiers, David Osowiechi, Gustavo Adolfo Vargas Hakim, Ismail Ben Ayed, Mehrdad Noori, Moslem Yazdanpanah, Sahar Dastani","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-09-11T18:33:40Z","title":"Purge-Gate: Backpropagation-Free Test-Time Adaptation for Point Clouds Classification via Token Purging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.09785","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":"sha256:2f9f5369134f892af4c282ef06fbb535f4eddf1cc051e4184fbc9d2511732343","target":"record","created_at":"2026-07-05T12:09:49Z","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":"b12a93e087908080604a78f2bee94461fe6d3473ca6caab740105e65dcf8d9cf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-09-11T18:33:40Z","title_canon_sha256":"13a209d60ae0697949eb06177d915b43aabd6dd9d359166db6db12a2561cdad0"},"schema_version":"1.0","source":{"id":"2509.09785","kind":"arxiv","version":1}},"canonical_sha256":"7711ed66d2e17add28aef248e009e14bed7f8dd913308c48724ecf783cd5a31c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7711ed66d2e17add28aef248e009e14bed7f8dd913308c48724ecf783cd5a31c","first_computed_at":"2026-07-05T12:09:49.287989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:09:49.287989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2++7icxnjmtqTJk7BDDR85uwlltsAq/lYv+Q6OM6bG6DpP+17BcgNO299LlnyyZXYpGmnfF0LtHIZn3EsbkoAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T12:09:49.288505Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.09785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f9f5369134f892af4c282ef06fbb535f4eddf1cc051e4184fbc9d2511732343","sha256:f29fcfcc8903804a650972f0d9424e68140dfa1b2e6ec01aca4b1f44a31ca759"],"state_sha256":"48ff44f67e3c012caaac81c6b6fa9793dd8c68ce1b20d762aa6cc9c2081264a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XEuksm1om84tUA/VNh9Xf3Kc4yNGra3gMVIreyjiOqStaYph+DPP3PUMlfh/hgs2fuQyYal5XqobVHbJICGQAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T02:20:35.759754Z","bundle_sha256":"3816ecc2d534e472581b7f5bb27d3fd58a8161fe2f1efe67ee6009b73d37212b"}}