{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:Y3NNXQYNHQ2JN5CFKXCTSEYTZU","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":"0051791f6880f7c5dcc00481744242d5ddc5acda8ff13c8215351215dd8db5a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-19T04:08:03Z","title_canon_sha256":"7a3e3f5790330dc5cf5092fa27f7ee57e73fa7173f9e14f743d09e9f243be678"},"schema_version":"1.0","source":{"id":"1307.5124","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.5124","created_at":"2026-05-18T03:18:05Z"},{"alias_kind":"arxiv_version","alias_value":"1307.5124v1","created_at":"2026-05-18T03:18:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.5124","created_at":"2026-05-18T03:18:05Z"},{"alias_kind":"pith_short_12","alias_value":"Y3NNXQYNHQ2J","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"Y3NNXQYNHQ2JN5CF","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"Y3NNXQYN","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:69b9f4de8ff216de12018447e5d084018ef23d415fd1cbf4ebad3cf7c8637f58","target":"graph","created_at":"2026-05-18T03:18:05Z","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"},"paper":{"abstract_excerpt":"The Feynman $i\\varepsilon$ is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically.","authors_text":"Edward Witten","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-19T04:08:03Z","title":"The Feynman $i \\epsilon$ in String Theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.5124","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:d6dd59cf5f61c870274bf65fba5128d9571c8e00cff7d7efcc4c39ebd628415d","target":"record","created_at":"2026-05-18T03:18:05Z","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":"0051791f6880f7c5dcc00481744242d5ddc5acda8ff13c8215351215dd8db5a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2013-07-19T04:08:03Z","title_canon_sha256":"7a3e3f5790330dc5cf5092fa27f7ee57e73fa7173f9e14f743d09e9f243be678"},"schema_version":"1.0","source":{"id":"1307.5124","kind":"arxiv","version":1}},"canonical_sha256":"c6dadbc30d3c3496f44555c5391313cd2bac59903c2709a6688341d626ec6224","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6dadbc30d3c3496f44555c5391313cd2bac59903c2709a6688341d626ec6224","first_computed_at":"2026-05-18T03:18:05.632697Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:18:05.632697Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gE52Rvxulz2A7Y3wN/lOiqvTJ2B2++y3JQ8E2W8pPyHaGhznye0b+SbplyPlqrUSID8vVsWlF55iCaB5mdJsAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:18:05.633237Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.5124","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6dd59cf5f61c870274bf65fba5128d9571c8e00cff7d7efcc4c39ebd628415d","sha256:69b9f4de8ff216de12018447e5d084018ef23d415fd1cbf4ebad3cf7c8637f58"],"state_sha256":"324ea3f0d05d77fa3f45435e835e3c1cc2ffb7ea3bc80c9618c37d7c8540af15"}