{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:D7SX62RVSWNQMQXPGYR3XSGYLQ","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":"9d39bbf20c416f5cf886900d5a023860d21d24afd73398b73a44c75b7de64481","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-04-23T16:09:40Z","title_canon_sha256":"66940dc4f77245e10b71c011db53f9b2ed9a3adbbb48103648216a3eb142f35c"},"schema_version":"1.0","source":{"id":"0804.3755","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.3755","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"arxiv_version","alias_value":"0804.3755v1","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.3755","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_12","alias_value":"D7SX62RVSWNQ","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_16","alias_value":"D7SX62RVSWNQMQXP","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_8","alias_value":"D7SX62RV","created_at":"2026-07-04T17:24:01Z"}],"graph_snapshots":[{"event_id":"sha256:90066d4dde1245adde35b8a325fb9e0e7f65e1e58f263499448fba99263fb8b1","target":"graph","created_at":"2026-07-04T17:24:01Z","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/0804.3755/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This document describes a Fortran 95 package for carrying out DGLAP evolution and other common manipulations of parton distribution functions (PDFs). The PDFs are represented on a grid in x-space so as to avoid limitations on the functional form of input distributions. Good speed and accuracy are obtained through the representation of splitting functions in terms of their convolution with a set of piecewise polynomial basis functions, and Runge-Kutta techniques are used for the evolution in Q. Unpolarised evolution is provided to NNLO, including heavy-quark thresholds in the MSbar scheme, and ","authors_text":"Gavin P. Salam, Juan Rojo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-04-23T16:09:40Z","title":"A Higher Order Perturbative Parton Evolution Toolkit (HOPPET)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.3755","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":"sha256:79cbf9ec359e0737dde92147d8b94bc8a76621ebe0429976c5ef649e8e216982","target":"record","created_at":"2026-07-04T17:24:01Z","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":"9d39bbf20c416f5cf886900d5a023860d21d24afd73398b73a44c75b7de64481","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-04-23T16:09:40Z","title_canon_sha256":"66940dc4f77245e10b71c011db53f9b2ed9a3adbbb48103648216a3eb142f35c"},"schema_version":"1.0","source":{"id":"0804.3755","kind":"arxiv","version":1}},"canonical_sha256":"1fe57f6a35959b0642ef3623bbc8d85c1b3d81b2597f0f5b055581778c60b015","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1fe57f6a35959b0642ef3623bbc8d85c1b3d81b2597f0f5b055581778c60b015","first_computed_at":"2026-07-04T17:24:01.290559Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:24:01.290559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8JuUZycXxrrYyZhkrMp7xumhOu6/rrmNlT5qBjjQpjgtT57JMBCOc3pD5y7uiyOM2h40WTa9aipgnxSEZV9cBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:24:01.290918Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.3755","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79cbf9ec359e0737dde92147d8b94bc8a76621ebe0429976c5ef649e8e216982","sha256:90066d4dde1245adde35b8a325fb9e0e7f65e1e58f263499448fba99263fb8b1"],"state_sha256":"345c090e5b0d6621c27aa3d01031fa87547e1947f4bf8410970a35bd16492aeb"}