{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:L5UASGRSARRX3AXJE5VT2VNINI","short_pith_number":"pith:L5UASGRS","canonical_record":{"source":{"id":"2606.25237","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IR","submitted_at":"2026-06-23T23:41:28Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"472e2c6977712347b27ebaaedf8cd6f77a8d48f6b6f32e39e1069bb14ec78361","abstract_canon_sha256":"e9e137ff43ed031605db16c1ded39532f340d233542c02d45967a7392cbf60aa"},"schema_version":"1.0"},"canonical_sha256":"5f68091a3204637d82e9276b3d55a86a2bbf74c9dbc3a2826f4bbe294a7017ca","source":{"kind":"arxiv","id":"2606.25237","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25237","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25237v1","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25237","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_12","alias_value":"L5UASGRSARRX","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_16","alias_value":"L5UASGRSARRX3AXJ","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_8","alias_value":"L5UASGRS","created_at":"2026-06-25T00:18:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:L5UASGRSARRX3AXJE5VT2VNINI","target":"record","payload":{"canonical_record":{"source":{"id":"2606.25237","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IR","submitted_at":"2026-06-23T23:41:28Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"472e2c6977712347b27ebaaedf8cd6f77a8d48f6b6f32e39e1069bb14ec78361","abstract_canon_sha256":"e9e137ff43ed031605db16c1ded39532f340d233542c02d45967a7392cbf60aa"},"schema_version":"1.0"},"canonical_sha256":"5f68091a3204637d82e9276b3d55a86a2bbf74c9dbc3a2826f4bbe294a7017ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-25T00:18:21.831252Z","signature_b64":"NOyLH8M4Gk5YWb960BwMLvLduhTT3Xv+qw8d7gjxO4UbVJS39QvChXVnrIIeXf33I3kAc2mI51BqCCduWze+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f68091a3204637d82e9276b3d55a86a2bbf74c9dbc3a2826f4bbe294a7017ca","last_reissued_at":"2026-06-25T00:18:21.830712Z","signature_status":"signed_v1","first_computed_at":"2026-06-25T00:18:21.830712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.25237","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":"2026-06-25T00:18:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5fN+qLyTOy11Cw4o3WH54REYMd8289dF3AKd/GkInPDqrqH4+27gVZ76koF7zvDJ7E/BDelSmI9dNKGYjBDQBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T14:00:31.683777Z"},"content_sha256":"0ab35e099f1e2147b0d6eef7d91400ddd098d79049f8f4cb4473e82b27d378c8","schema_version":"1.0","event_id":"sha256:0ab35e099f1e2147b0d6eef7d91400ddd098d79049f8f4cb4473e82b27d378c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:L5UASGRSARRX3AXJE5VT2VNINI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extreme Meta-Classification for Large-Scale Zero-Shot Retrieval","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.IR","authors_text":"Anirudh Buvanesh, Bhawna Paliwal, Deepak Saini, Jian Jiao, Kunal Dahiya, Manik Varma, Sachin Yadav, Siddarth Asokan, Yashoteja Prabhu","submitted_at":"2026-06-23T23:41:28Z","abstract_excerpt":"We develop accurate and efficient solutions for large-scale retrieval tasks where novel (zero-shot) items can arrive continuously at a rapid pace. Conventional Siamese-style approaches embed both queries and items through a small encoder and retrieve the items lying closest to the query. While this approach allows efficient addition and retrieval of novel items, the small encoder lacks sufficient capacity for the necessary world knowledge in complex retrieval tasks. The extreme classification approaches have addressed this by learning a separate classifier for each item observed in the trainin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25237","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/2606.25237/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":"2026-06-25T00:18:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L885OzJtLLgQESeA23MKiEOHx2qJdaW+DRBFjDVvrmk2FP0FFWnjGToxypePm5aTgSy2sSbeIG1lXU8vU8KFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T14:00:31.684337Z"},"content_sha256":"021673ada4cce27c532e0fcb0691f7b5d094dcb07c8f02b8b4ce8ce3eb169091","schema_version":"1.0","event_id":"sha256:021673ada4cce27c532e0fcb0691f7b5d094dcb07c8f02b8b4ce8ce3eb169091"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5UASGRSARRX3AXJE5VT2VNINI/bundle.json","state_url":"https://pith.science/pith/L5UASGRSARRX3AXJE5VT2VNINI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5UASGRSARRX3AXJE5VT2VNINI/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":"2026-06-27T14:00:31Z","links":{"resolver":"https://pith.science/pith/L5UASGRSARRX3AXJE5VT2VNINI","bundle":"https://pith.science/pith/L5UASGRSARRX3AXJE5VT2VNINI/bundle.json","state":"https://pith.science/pith/L5UASGRSARRX3AXJE5VT2VNINI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5UASGRSARRX3AXJE5VT2VNINI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:L5UASGRSARRX3AXJE5VT2VNINI","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":"e9e137ff43ed031605db16c1ded39532f340d233542c02d45967a7392cbf60aa","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IR","submitted_at":"2026-06-23T23:41:28Z","title_canon_sha256":"472e2c6977712347b27ebaaedf8cd6f77a8d48f6b6f32e39e1069bb14ec78361"},"schema_version":"1.0","source":{"id":"2606.25237","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25237","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25237v1","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25237","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_12","alias_value":"L5UASGRSARRX","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_16","alias_value":"L5UASGRSARRX3AXJ","created_at":"2026-06-25T00:18:21Z"},{"alias_kind":"pith_short_8","alias_value":"L5UASGRS","created_at":"2026-06-25T00:18:21Z"}],"graph_snapshots":[{"event_id":"sha256:021673ada4cce27c532e0fcb0691f7b5d094dcb07c8f02b8b4ce8ce3eb169091","target":"graph","created_at":"2026-06-25T00:18:21Z","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/2606.25237/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We develop accurate and efficient solutions for large-scale retrieval tasks where novel (zero-shot) items can arrive continuously at a rapid pace. Conventional Siamese-style approaches embed both queries and items through a small encoder and retrieve the items lying closest to the query. While this approach allows efficient addition and retrieval of novel items, the small encoder lacks sufficient capacity for the necessary world knowledge in complex retrieval tasks. The extreme classification approaches have addressed this by learning a separate classifier for each item observed in the trainin","authors_text":"Anirudh Buvanesh, Bhawna Paliwal, Deepak Saini, Jian Jiao, Kunal Dahiya, Manik Varma, Sachin Yadav, Siddarth Asokan, Yashoteja Prabhu","cross_cats":["cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IR","submitted_at":"2026-06-23T23:41:28Z","title":"Extreme Meta-Classification for Large-Scale Zero-Shot Retrieval"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25237","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":"sha256:0ab35e099f1e2147b0d6eef7d91400ddd098d79049f8f4cb4473e82b27d378c8","target":"record","created_at":"2026-06-25T00:18:21Z","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":"e9e137ff43ed031605db16c1ded39532f340d233542c02d45967a7392cbf60aa","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.IR","submitted_at":"2026-06-23T23:41:28Z","title_canon_sha256":"472e2c6977712347b27ebaaedf8cd6f77a8d48f6b6f32e39e1069bb14ec78361"},"schema_version":"1.0","source":{"id":"2606.25237","kind":"arxiv","version":1}},"canonical_sha256":"5f68091a3204637d82e9276b3d55a86a2bbf74c9dbc3a2826f4bbe294a7017ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f68091a3204637d82e9276b3d55a86a2bbf74c9dbc3a2826f4bbe294a7017ca","first_computed_at":"2026-06-25T00:18:21.830712Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-25T00:18:21.830712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NOyLH8M4Gk5YWb960BwMLvLduhTT3Xv+qw8d7gjxO4UbVJS39QvChXVnrIIeXf33I3kAc2mI51BqCCduWze+Bw==","signature_status":"signed_v1","signed_at":"2026-06-25T00:18:21.831252Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.25237","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ab35e099f1e2147b0d6eef7d91400ddd098d79049f8f4cb4473e82b27d378c8","sha256:021673ada4cce27c532e0fcb0691f7b5d094dcb07c8f02b8b4ce8ce3eb169091"],"state_sha256":"207708ccf9e802dc16e8e62b479471fb6d145d1d035427d7be52bd2baf0fbe3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9E71QgekTj61BYvgNVM0JWLhq0mMCiBDO+NOEuauHoSab4eulSzev5k3UH5iV804AJaAy0wB3Ergfk1/OdRrCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T14:00:31.689543Z","bundle_sha256":"fa932dabd820411c32d57480684b8736ff8889140a7583d789ff2bcb6326e2d8"}}