{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:OKG4BNISTB7X5MFM4EXYNP5RQL","short_pith_number":"pith:OKG4BNIS","canonical_record":{"source":{"id":"2009.06635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-09-14T18:00:00Z","cross_cats_sorted":["cs.LG","physics.comp-ph"],"title_canon_sha256":"0ccdc5f4548fcb93dbdf6fb377e424d02725d428f354e1e65ccf645c8db89fd6","abstract_canon_sha256":"63a0a0b36cadf590415ec8692d109c3278c0f120253e5d88f96f87bced99450b"},"schema_version":"1.0"},"canonical_sha256":"728dc0b512987f7eb0ace12f86bfb182d6dc105f6122afcecc85a92346f9d6f7","source":{"kind":"arxiv","id":"2009.06635","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06635","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06635v1","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06635","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_12","alias_value":"OKG4BNISTB7X","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_16","alias_value":"OKG4BNISTB7X5MFM","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_8","alias_value":"OKG4BNIS","created_at":"2026-07-05T02:41:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:OKG4BNISTB7X5MFM4EXYNP5RQL","target":"record","payload":{"canonical_record":{"source":{"id":"2009.06635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-09-14T18:00:00Z","cross_cats_sorted":["cs.LG","physics.comp-ph"],"title_canon_sha256":"0ccdc5f4548fcb93dbdf6fb377e424d02725d428f354e1e65ccf645c8db89fd6","abstract_canon_sha256":"63a0a0b36cadf590415ec8692d109c3278c0f120253e5d88f96f87bced99450b"},"schema_version":"1.0"},"canonical_sha256":"728dc0b512987f7eb0ace12f86bfb182d6dc105f6122afcecc85a92346f9d6f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:41:04.751634Z","signature_b64":"lqVWpFyAzoiNvy0B/UQvUjjOIBEcgfiEF4Nvac6WkwV7bGZT9NaeX68i9ApECXOPUgzX9eCTniG+7i7Kfm8oCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"728dc0b512987f7eb0ace12f86bfb182d6dc105f6122afcecc85a92346f9d6f7","last_reissued_at":"2026-07-05T02:41:04.751112Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:41:04.751112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.06635","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":"2026-07-05T02:41:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BcpyFuZFVkmEumEHm9VoJvUFKqgesfYv2Bqf/3nbPTT9uv1m9m3nTwoVTgsJ4Jj46DrSK8RdfCvB8driAMWmAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:13:02.847873Z"},"content_sha256":"e8710ed1c780196eaca6a3b9ffd8cddbe946eaa1b5d8a51f501cc97ac3e07397","schema_version":"1.0","event_id":"sha256:e8710ed1c780196eaca6a3b9ffd8cddbe946eaa1b5d8a51f501cc97ac3e07397"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:OKG4BNISTB7X5MFM4EXYNP5RQL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PDFFlow: parton distribution functions on GPU","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG","physics.comp-ph"],"primary_cat":"hep-ph","authors_text":"Juan M. Cruz-Martinez, Marco Rossi, Stefano Carrazza","submitted_at":"2020-09-14T18:00:00Z","abstract_excerpt":"We present PDFFlow, a new software for fast evaluation of parton distribution functions (PDFs) designed for platforms with hardware accelerators. PDFs are essential for the calculation of particle physics observables through Monte Carlo simulation techniques. The evaluation of a generic set of PDFs for quarks and gluon at a given momentum fraction and energy scale requires the implementation of interpolation algorithms as introduced for the first time by the LHAPDF project. PDFFlow extends and implements these interpolation algorithms using Google's TensorFlow library providing the capabilitie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06635","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/2009.06635/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":"2026-07-05T02:41:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OfsWVlNz2cU/n/8Vnusb9h/ycu4d2PqW+y95umtu4GX3hqj4bAZhD0WOc8YnNpG3kT+CuNfJR3Tcf0gi6s4jAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:13:02.851114Z"},"content_sha256":"9f06c727b760facefdd0749f24664a0edb4a0df52e5e9565d15676f801959079","schema_version":"1.0","event_id":"sha256:9f06c727b760facefdd0749f24664a0edb4a0df52e5e9565d15676f801959079"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/bundle.json","state_url":"https://pith.science/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/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":"2026-08-07T09:13:02Z","links":{"resolver":"https://pith.science/pith/OKG4BNISTB7X5MFM4EXYNP5RQL","bundle":"https://pith.science/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/bundle.json","state":"https://pith.science/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OKG4BNISTB7X5MFM4EXYNP5RQL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:OKG4BNISTB7X5MFM4EXYNP5RQL","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":"63a0a0b36cadf590415ec8692d109c3278c0f120253e5d88f96f87bced99450b","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-09-14T18:00:00Z","title_canon_sha256":"0ccdc5f4548fcb93dbdf6fb377e424d02725d428f354e1e65ccf645c8db89fd6"},"schema_version":"1.0","source":{"id":"2009.06635","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06635","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06635v1","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06635","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_12","alias_value":"OKG4BNISTB7X","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_16","alias_value":"OKG4BNISTB7X5MFM","created_at":"2026-07-05T02:41:04Z"},{"alias_kind":"pith_short_8","alias_value":"OKG4BNIS","created_at":"2026-07-05T02:41:04Z"}],"graph_snapshots":[{"event_id":"sha256:9f06c727b760facefdd0749f24664a0edb4a0df52e5e9565d15676f801959079","target":"graph","created_at":"2026-07-05T02:41:04Z","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/2009.06635/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present PDFFlow, a new software for fast evaluation of parton distribution functions (PDFs) designed for platforms with hardware accelerators. PDFs are essential for the calculation of particle physics observables through Monte Carlo simulation techniques. The evaluation of a generic set of PDFs for quarks and gluon at a given momentum fraction and energy scale requires the implementation of interpolation algorithms as introduced for the first time by the LHAPDF project. PDFFlow extends and implements these interpolation algorithms using Google's TensorFlow library providing the capabilitie","authors_text":"Juan M. Cruz-Martinez, Marco Rossi, Stefano Carrazza","cross_cats":["cs.LG","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-09-14T18:00:00Z","title":"PDFFlow: parton distribution functions on GPU"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06635","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:e8710ed1c780196eaca6a3b9ffd8cddbe946eaa1b5d8a51f501cc97ac3e07397","target":"record","created_at":"2026-07-05T02:41:04Z","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":"63a0a0b36cadf590415ec8692d109c3278c0f120253e5d88f96f87bced99450b","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-09-14T18:00:00Z","title_canon_sha256":"0ccdc5f4548fcb93dbdf6fb377e424d02725d428f354e1e65ccf645c8db89fd6"},"schema_version":"1.0","source":{"id":"2009.06635","kind":"arxiv","version":1}},"canonical_sha256":"728dc0b512987f7eb0ace12f86bfb182d6dc105f6122afcecc85a92346f9d6f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"728dc0b512987f7eb0ace12f86bfb182d6dc105f6122afcecc85a92346f9d6f7","first_computed_at":"2026-07-05T02:41:04.751112Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:41:04.751112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lqVWpFyAzoiNvy0B/UQvUjjOIBEcgfiEF4Nvac6WkwV7bGZT9NaeX68i9ApECXOPUgzX9eCTniG+7i7Kfm8oCw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:41:04.751634Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.06635","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8710ed1c780196eaca6a3b9ffd8cddbe946eaa1b5d8a51f501cc97ac3e07397","sha256:9f06c727b760facefdd0749f24664a0edb4a0df52e5e9565d15676f801959079"],"state_sha256":"29ebefa6709195c43bd24fc18299a6775ad813dbfbb19c231390447fd75add00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8KWrxwmxuPAuz4Vj2aEX1g8wM2zeFj9pWLylmylBiJqfcPGz13QhoNMXjbPqGnmXoGECgMIBzw0Tl05NSWsDCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T09:13:02.865686Z","bundle_sha256":"0d4b9f7976ae964bbb81dd659e04115511690ef64e35a2fb49dd9452966672f6"}}