{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:CWCWQBLGQ35PY6ZMOBXHWWKPCU","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":"63b944dedfbbe348d7ac50c7d22dbf0300f67bccc31ac36dfabff9e394f5f12a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-02-18T20:01:39Z","title_canon_sha256":"6efb6bc7bf34ccc83402ea3159d42ba405501760491f0e478ff10b929aafc20e"},"schema_version":"1.0","source":{"id":"2602.16837","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.16837","created_at":"2026-05-28T01:04:37Z"},{"alias_kind":"arxiv_version","alias_value":"2602.16837v2","created_at":"2026-05-28T01:04:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.16837","created_at":"2026-05-28T01:04:37Z"},{"alias_kind":"pith_short_12","alias_value":"CWCWQBLGQ35P","created_at":"2026-05-28T01:04:37Z"},{"alias_kind":"pith_short_16","alias_value":"CWCWQBLGQ35PY6ZM","created_at":"2026-05-28T01:04:37Z"},{"alias_kind":"pith_short_8","alias_value":"CWCWQBLG","created_at":"2026-05-28T01:04:37Z"}],"graph_snapshots":[{"event_id":"sha256:91270fe52c62c51a8b6c5a37100f4b175ea6541bc35ddb224f75b38a3d42fdce","target":"graph","created_at":"2026-05-28T01:04:37Z","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/2602.16837/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Transformer models systematically favor certain token positions, yet the architectural origins of this position bias remain poorly understood. This bias is closely connected to the Lost-in-the-Middle phenomenon, where models underutilize information placed in the middle of the context. We show that Lost-in-the-Middle-type behavior can arise from the architecture of causal Transformers itself. To do so, we develop a structural theory of position bias based on residual-aware cumulative attention rollout. At finite depth, causal masking and residual connections induce broad, often U-shaped, influ","authors_text":"Hanna Herasimchyk, Robin Labryga, S\\\"oren Laue, Tomislav Prusina","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-02-18T20:01:39Z","title":"A Structural Theory of Position Bias in Transformers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.16837","kind":"arxiv","version":2},"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":"sha256:26f467d4abf26c620b48ade9dd59dead784caf9862f497acebf18369e8af54cc","target":"record","created_at":"2026-05-28T01:04:37Z","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":"63b944dedfbbe348d7ac50c7d22dbf0300f67bccc31ac36dfabff9e394f5f12a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-02-18T20:01:39Z","title_canon_sha256":"6efb6bc7bf34ccc83402ea3159d42ba405501760491f0e478ff10b929aafc20e"},"schema_version":"1.0","source":{"id":"2602.16837","kind":"arxiv","version":2}},"canonical_sha256":"158568056686fafc7b2c706e7b594f150035af552dd2cf2819ad0438862dbdd7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"158568056686fafc7b2c706e7b594f150035af552dd2cf2819ad0438862dbdd7","first_computed_at":"2026-05-28T01:04:37.156644Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-28T01:04:37.156644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D5VppMZp2gxhkZV177keZmpLE7JOLRuJa/Plt907IHEHd6to0iqqhnvKJzo3ll+cdtgYxyIc88l2EluyK1t3CQ==","signature_status":"signed_v1","signed_at":"2026-05-28T01:04:37.157147Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.16837","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:26f467d4abf26c620b48ade9dd59dead784caf9862f497acebf18369e8af54cc","sha256:91270fe52c62c51a8b6c5a37100f4b175ea6541bc35ddb224f75b38a3d42fdce"],"state_sha256":"33596b8563a0689dab2f37345a1b11b2f1360083d3ad7f6f72f46802e63a6a5e"}