{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:6EEX5MFRXM2QDIKD5IS3TQ4HCK","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":"e4ffe0a837f8013b3dbed3d664970448af0c4fec55f3e80e6f271683801f0f46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-12-10T16:56:32Z","title_canon_sha256":"64d15599859c2daac987ca8dbfabff73b39024f7148d44cd5f6f9f8dfc4b4fff"},"schema_version":"1.0","source":{"id":"1212.2132","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.2132","created_at":"2026-05-18T03:38:46Z"},{"alias_kind":"arxiv_version","alias_value":"1212.2132v1","created_at":"2026-05-18T03:38:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.2132","created_at":"2026-05-18T03:38:46Z"},{"alias_kind":"pith_short_12","alias_value":"6EEX5MFRXM2Q","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6EEX5MFRXM2QDIKD","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6EEX5MFR","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:1d1872dee9f73ca58e0e240fc8001d24aea79869206deb9bc3758e79a2e88146","target":"graph","created_at":"2026-05-18T03:38:46Z","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":"We discuss the extension of the maximal-unitarity method to two loops, focusing on the example of the planar double box. Maximal cuts are reinterpreted as contour integrals, with the choice of contour fixed by the requirement that integrals of total derivatives vanish on it. The resulting formulae, like their one-loop counterparts, can be applied either analytically or numerically.","authors_text":"David A. Kosower, Henrik Johansson, Kasper J. Larsen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-12-10T16:56:32Z","title":"An Overview of Maximal Unitarity at Two Loops"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.2132","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":"sha256:5e97646bab8f560fbea23fd2ee5b2f17c162d7181b9d7c55015423cd95656ca2","target":"record","created_at":"2026-05-18T03:38:46Z","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":"e4ffe0a837f8013b3dbed3d664970448af0c4fec55f3e80e6f271683801f0f46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-12-10T16:56:32Z","title_canon_sha256":"64d15599859c2daac987ca8dbfabff73b39024f7148d44cd5f6f9f8dfc4b4fff"},"schema_version":"1.0","source":{"id":"1212.2132","kind":"arxiv","version":1}},"canonical_sha256":"f1097eb0b1bb3501a143ea25b9c387129e6c034721b477e765ed2e300d858d4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1097eb0b1bb3501a143ea25b9c387129e6c034721b477e765ed2e300d858d4d","first_computed_at":"2026-05-18T03:38:46.982956Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:46.982956Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r/VqFFDfewlx/bq5HBDTUTK3AOGifamSmy2q8wklXxJ3BZTokSeKi6OhN3D44OcdxzRp+NYhl6oszT9B55gKBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:46.983975Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.2132","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e97646bab8f560fbea23fd2ee5b2f17c162d7181b9d7c55015423cd95656ca2","sha256:1d1872dee9f73ca58e0e240fc8001d24aea79869206deb9bc3758e79a2e88146"],"state_sha256":"155f0ef0061d0cd1912f8fe312d164b2c1302b952b1821f0744fe321ff3aff03"}