{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LLXR3GJFBR24FRB4KPPLDUO76N","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":"714a81a13da50ef9806e5249b3e2e0878dd477f776bfed8cc79c7d58a7fe1a0b","cross_cats_sorted":["cs.LO"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cs.PL","submitted_at":"2019-08-24T10:53:27Z","title_canon_sha256":"57a9743baedffc281599cd1ac196995918fe919f4d1d286f11c0c75c5c8ee4dd"},"schema_version":"1.0","source":{"id":"1908.09123","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09123","created_at":"2026-07-05T01:22:14Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09123v2","created_at":"2026-07-05T01:22:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09123","created_at":"2026-07-05T01:22:14Z"},{"alias_kind":"pith_short_12","alias_value":"LLXR3GJFBR24","created_at":"2026-07-05T01:22:14Z"},{"alias_kind":"pith_short_16","alias_value":"LLXR3GJFBR24FRB4","created_at":"2026-07-05T01:22:14Z"},{"alias_kind":"pith_short_8","alias_value":"LLXR3GJF","created_at":"2026-07-05T01:22:14Z"}],"graph_snapshots":[{"event_id":"sha256:b5b21936b65533ffc6127d8917fec5dfbca44ee7bd8e45351ae59c7a489f4501","target":"graph","created_at":"2026-07-05T01:22:14Z","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/1908.09123/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"For those of us who generally live in the world of syntax, semantic proof techniques such as reducibility, realizability or logical relations seem somewhat magical despite -- or perhaps due to -- their seemingly unreasonable effectiveness. Why do they work? At which point in the proof is \"the real work\" done?\n  Hoping to build a programming intuition of these proofs, we implement a normalization argument for the simply-typed lambda-calculus with sums: instead of a proof, it is described as a program in a dependently-typed meta-language.\n  The semantic technique we set out to study is Krivine's","authors_text":"Gabriel Scherer, Lionel Rieg, Pierre-\\'Evariste Dagand","cross_cats":["cs.LO"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cs.PL","submitted_at":"2019-08-24T10:53:27Z","title":"Dependent Pearl: Normalization by realizability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09123","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":"sha256:2428c5b918d9bae633d8ec3d9335a1e709b97ae05b993a98d3d4441f63a1b081","target":"record","created_at":"2026-07-05T01:22:14Z","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":"714a81a13da50ef9806e5249b3e2e0878dd477f776bfed8cc79c7d58a7fe1a0b","cross_cats_sorted":["cs.LO"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cs.PL","submitted_at":"2019-08-24T10:53:27Z","title_canon_sha256":"57a9743baedffc281599cd1ac196995918fe919f4d1d286f11c0c75c5c8ee4dd"},"schema_version":"1.0","source":{"id":"1908.09123","kind":"arxiv","version":2}},"canonical_sha256":"5aef1d99250c75c2c43c53deb1d1dff35e20540b37255bc9711c6be23a532dcc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5aef1d99250c75c2c43c53deb1d1dff35e20540b37255bc9711c6be23a532dcc","first_computed_at":"2026-07-05T01:22:14.422952Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:22:14.422952Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p4XjKTXjonGYwpLWhdkO/8yikRVWH/34Je5IoAVLG1LrXGplKpDr5nITtkbuoi0ixfol6Ed6UuJl1zRyh4nJCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:22:14.423460Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.09123","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2428c5b918d9bae633d8ec3d9335a1e709b97ae05b993a98d3d4441f63a1b081","sha256:b5b21936b65533ffc6127d8917fec5dfbca44ee7bd8e45351ae59c7a489f4501"],"state_sha256":"c3bdf79684213be70a438154c55510949d46be216eb7214ac94d963d8b55607f"}