{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ESJBITJHQ4RV72FSOGK4VCI6K2","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":"c7ccbb6748dbb0bf97999f679dd007c278aae260281c9a6e7a0323b574154f68","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-05-07T14:01:22Z","title_canon_sha256":"815226ed0bad90c16527e316740b1f2d8dfbe5f8c761ae7c39734a6a11eb2a14"},"schema_version":"1.0","source":{"id":"2505.04434","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.04434","created_at":"2026-07-05T10:59:51Z"},{"alias_kind":"arxiv_version","alias_value":"2505.04434v1","created_at":"2026-07-05T10:59:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.04434","created_at":"2026-07-05T10:59:51Z"},{"alias_kind":"pith_short_12","alias_value":"ESJBITJHQ4RV","created_at":"2026-07-05T10:59:51Z"},{"alias_kind":"pith_short_16","alias_value":"ESJBITJHQ4RV72FS","created_at":"2026-07-05T10:59:51Z"},{"alias_kind":"pith_short_8","alias_value":"ESJBITJH","created_at":"2026-07-05T10:59:51Z"}],"graph_snapshots":[{"event_id":"sha256:ea1d0400691fdbad8fdfdd08de9682b0c5c8039d291c7f71a3ebc6480c8d8331","target":"graph","created_at":"2026-07-05T10:59:51Z","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/2505.04434/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Modern recommendation and search systems typically employ multi-stage ranking architectures to efficiently handle billions of candidates. The conventional approach uses distinct L1 (candidate retrieval) and L2 (re-ranking) models with different optimization objectives, introducing critical limitations including irreversible error propagation and suboptimal ranking. This paper identifies and analyzes the fundamental limitations of this decoupled paradigm and proposes LT-TTD (Listwise Transformer with Two-Tower Distillation), a novel unified architecture that bridges retrieval and ranking phases","authors_text":"Ayoub Abraich","cross_cats":["stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-05-07T14:01:22Z","title":"Theoretical Guarantees for LT-TTD: A Unified Transformer-based Architecture for Two-Level Ranking Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.04434","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":"sha256:744236382c358282f49e0bfb2dc442c25498de516952a9052b9d0b9e9f2d91cf","target":"record","created_at":"2026-07-05T10:59:51Z","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":"c7ccbb6748dbb0bf97999f679dd007c278aae260281c9a6e7a0323b574154f68","cross_cats_sorted":["stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-05-07T14:01:22Z","title_canon_sha256":"815226ed0bad90c16527e316740b1f2d8dfbe5f8c761ae7c39734a6a11eb2a14"},"schema_version":"1.0","source":{"id":"2505.04434","kind":"arxiv","version":1}},"canonical_sha256":"2492144d2787235fe8b27195ca891e56922fa1bb9cef0e9ca18f9b8ef6247319","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2492144d2787235fe8b27195ca891e56922fa1bb9cef0e9ca18f9b8ef6247319","first_computed_at":"2026-07-05T10:59:51.811005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:59:51.811005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yCiG3KI/PDCVteOoeV1v273MRI+s4hiXfFQtNP8JbVKo7Tah0aQ/+5xLuy7mEQDxFZT0MpVU2norpDM/BFEqAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:59:51.811553Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.04434","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:744236382c358282f49e0bfb2dc442c25498de516952a9052b9d0b9e9f2d91cf","sha256:ea1d0400691fdbad8fdfdd08de9682b0c5c8039d291c7f71a3ebc6480c8d8331"],"state_sha256":"8d14d910e040fd180021033b80ff9375e847e7104c538c7a99ab7cda73dd6052"}