{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:D7SX62RVSWNQMQXPGYR3XSGYLQ","short_pith_number":"pith:D7SX62RV","canonical_record":{"source":{"id":"0804.3755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-04-23T16:09:40Z","cross_cats_sorted":[],"title_canon_sha256":"66940dc4f77245e10b71c011db53f9b2ed9a3adbbb48103648216a3eb142f35c","abstract_canon_sha256":"9d39bbf20c416f5cf886900d5a023860d21d24afd73398b73a44c75b7de64481"},"schema_version":"1.0"},"canonical_sha256":"1fe57f6a35959b0642ef3623bbc8d85c1b3d81b2597f0f5b055581778c60b015","source":{"kind":"arxiv","id":"0804.3755","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:D7SX62RVSWNQMQXPGYR3XSGYLQ","target":"record","payload":{"canonical_record":{"source":{"id":"0804.3755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-04-23T16:09:40Z","cross_cats_sorted":[],"title_canon_sha256":"66940dc4f77245e10b71c011db53f9b2ed9a3adbbb48103648216a3eb142f35c","abstract_canon_sha256":"9d39bbf20c416f5cf886900d5a023860d21d24afd73398b73a44c75b7de64481"},"schema_version":"1.0"},"canonical_sha256":"1fe57f6a35959b0642ef3623bbc8d85c1b3d81b2597f0f5b055581778c60b015","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:24:01.290918Z","signature_b64":"8JuUZycXxrrYyZhkrMp7xumhOu6/rrmNlT5qBjjQpjgtT57JMBCOc3pD5y7uiyOM2h40WTa9aipgnxSEZV9cBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1fe57f6a35959b0642ef3623bbc8d85c1b3d81b2597f0f5b055581778c60b015","last_reissued_at":"2026-07-04T17:24:01.290559Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:24:01.290559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.3755","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:24:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w8POZcrRjX88vPgPi34FY4bdRxMVlUWUPBVWB5zQe1F4TbMPLxyOz2c+XGK3B0A1z9+96tWbTiICwFOzBlEkCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:14:30.095087Z"},"content_sha256":"79cbf9ec359e0737dde92147d8b94bc8a76621ebe0429976c5ef649e8e216982","schema_version":"1.0","event_id":"sha256:79cbf9ec359e0737dde92147d8b94bc8a76621ebe0429976c5ef649e8e216982"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:D7SX62RVSWNQMQXPGYR3XSGYLQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Higher Order Perturbative Parton Evolution Toolkit (HOPPET)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Gavin P. Salam, Juan Rojo","submitted_at":"2008-04-23T16:09:40Z","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 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.3755","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0804.3755/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:24:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ihXNPx809M8LJFL93K+RrZDvm98x7tzNLXJrWv4BYLmeN9GfH3s/wrOXAd+paDtrtlS01bfjdOt2R3bWwY/bAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:14:30.095608Z"},"content_sha256":"90066d4dde1245adde35b8a325fb9e0e7f65e1e58f263499448fba99263fb8b1","schema_version":"1.0","event_id":"sha256:90066d4dde1245adde35b8a325fb9e0e7f65e1e58f263499448fba99263fb8b1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/bundle.json","state_url":"https://pith.science/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T17:14:30Z","links":{"resolver":"https://pith.science/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ","bundle":"https://pith.science/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/bundle.json","state":"https://pith.science/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D7SX62RVSWNQMQXPGYR3XSGYLQ/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H9f5YwwP2MyH1UIzikLeKXMKnBgN9tPvCzN5nGeEV8RYlhR8fNSz8AKrvhSVkUW91lxAZxMe8Yk1g5bYPyF8Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:14:30.101135Z","bundle_sha256":"515c84446497e2b3299a54f7280a8b9d10a8434a94b6c1f36ed33fd89a32fef3"}}