{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:IUPKVJT6LZPC6O7SBW62CUI2HX","short_pith_number":"pith:IUPKVJT6","canonical_record":{"source":{"id":"1409.4283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-09-15T14:55:33Z","cross_cats_sorted":[],"title_canon_sha256":"0d37b4ca8fd9feb6a1edde1ace3184383a13919dbc54fbbe17f854164e30bf49","abstract_canon_sha256":"cf220cc52100c4c47a79535e456fc0cf63cb310c0f79f49252f7b5ca278e3f18"},"schema_version":"1.0"},"canonical_sha256":"451eaaa67e5e5e2f3bf20dbda1511a3dd66c1e2ac3505a47a0a8900cd5c61304","source":{"kind":"arxiv","id":"1409.4283","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4283","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4283v1","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4283","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"pith_short_12","alias_value":"IUPKVJT6LZPC","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_16","alias_value":"IUPKVJT6LZPC6O7S","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_8","alias_value":"IUPKVJT6","created_at":"2026-05-18T12:28:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:IUPKVJT6LZPC6O7SBW62CUI2HX","target":"record","payload":{"canonical_record":{"source":{"id":"1409.4283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-09-15T14:55:33Z","cross_cats_sorted":[],"title_canon_sha256":"0d37b4ca8fd9feb6a1edde1ace3184383a13919dbc54fbbe17f854164e30bf49","abstract_canon_sha256":"cf220cc52100c4c47a79535e456fc0cf63cb310c0f79f49252f7b5ca278e3f18"},"schema_version":"1.0"},"canonical_sha256":"451eaaa67e5e5e2f3bf20dbda1511a3dd66c1e2ac3505a47a0a8900cd5c61304","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:42:47.163830Z","signature_b64":"86M1vnjQNAn+ZVwH4I4Yzv2b276u92YQmF7ypcIGFagOM1I94dx1xZpyHT7yzVU61blWMuZB9bgv0fcAHo9lDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"451eaaa67e5e5e2f3bf20dbda1511a3dd66c1e2ac3505a47a0a8900cd5c61304","last_reissued_at":"2026-05-18T02:42:47.163343Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:42:47.163343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.4283","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":"2026-05-18T02:42:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ABLf9U3T1NqKZVZBFGWNbhB9sjUxGPVZ7pmK1w46d1RNbrM5y9ZQ7CpqGrxeSQ+aeGc0rw18poamQ94QNs2LAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T23:16:07.371690Z"},"content_sha256":"ffbac63fd316346ed8f06ba8e17cabd85997dffa38357665711ea71aa9edfcfe","schema_version":"1.0","event_id":"sha256:ffbac63fd316346ed8f06ba8e17cabd85997dffa38357665711ea71aa9edfcfe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:IUPKVJT6LZPC6O7SBW62CUI2HX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Closure testing the NNPDF3.0 methodology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Christopher S. Deans","submitted_at":"2014-09-15T14:55:33Z","abstract_excerpt":"A thorough understanding of the issues surrounding the determination of parton distributions is crucial due to their importance to calculations of LHC observables. However, it is still not fully understood how much of an impact methodological bias has on PDF fits. Closure tests, where a fit is performed to pseudo-data generated using an existing PDF set, provide a way of directly investigating whether current PDF fitting methodologies are successful. Here, we present a sample of results from closure tests applying the NNPDF methodology to data created using a variety of different PDF sets. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4283","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":""},"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":"2026-05-18T02:42:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"slRdGhobvyJAWiLnuMDF/PrVZkHAr/plf4zXkL/eUflLmMoFcEsrAAMHA+Vz3yHN9crF7ruxzvepqgXqMu9ABA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T23:16:07.372153Z"},"content_sha256":"a48f0cce91a7b747970205266028a10552a816759315834152cc6e6a69a7d22d","schema_version":"1.0","event_id":"sha256:a48f0cce91a7b747970205266028a10552a816759315834152cc6e6a69a7d22d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/bundle.json","state_url":"https://pith.science/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/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":"2026-08-01T23:16:07Z","links":{"resolver":"https://pith.science/pith/IUPKVJT6LZPC6O7SBW62CUI2HX","bundle":"https://pith.science/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/bundle.json","state":"https://pith.science/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IUPKVJT6LZPC6O7SBW62CUI2HX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:IUPKVJT6LZPC6O7SBW62CUI2HX","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":"cf220cc52100c4c47a79535e456fc0cf63cb310c0f79f49252f7b5ca278e3f18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-09-15T14:55:33Z","title_canon_sha256":"0d37b4ca8fd9feb6a1edde1ace3184383a13919dbc54fbbe17f854164e30bf49"},"schema_version":"1.0","source":{"id":"1409.4283","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4283","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4283v1","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4283","created_at":"2026-05-18T02:42:47Z"},{"alias_kind":"pith_short_12","alias_value":"IUPKVJT6LZPC","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_16","alias_value":"IUPKVJT6LZPC6O7S","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_8","alias_value":"IUPKVJT6","created_at":"2026-05-18T12:28:33Z"}],"graph_snapshots":[{"event_id":"sha256:a48f0cce91a7b747970205266028a10552a816759315834152cc6e6a69a7d22d","target":"graph","created_at":"2026-05-18T02:42:47Z","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":"A thorough understanding of the issues surrounding the determination of parton distributions is crucial due to their importance to calculations of LHC observables. However, it is still not fully understood how much of an impact methodological bias has on PDF fits. Closure tests, where a fit is performed to pseudo-data generated using an existing PDF set, provide a way of directly investigating whether current PDF fitting methodologies are successful. Here, we present a sample of results from closure tests applying the NNPDF methodology to data created using a variety of different PDF sets. The","authors_text":"Christopher S. Deans","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-09-15T14:55:33Z","title":"Closure testing the NNPDF3.0 methodology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4283","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:ffbac63fd316346ed8f06ba8e17cabd85997dffa38357665711ea71aa9edfcfe","target":"record","created_at":"2026-05-18T02:42:47Z","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":"cf220cc52100c4c47a79535e456fc0cf63cb310c0f79f49252f7b5ca278e3f18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-09-15T14:55:33Z","title_canon_sha256":"0d37b4ca8fd9feb6a1edde1ace3184383a13919dbc54fbbe17f854164e30bf49"},"schema_version":"1.0","source":{"id":"1409.4283","kind":"arxiv","version":1}},"canonical_sha256":"451eaaa67e5e5e2f3bf20dbda1511a3dd66c1e2ac3505a47a0a8900cd5c61304","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"451eaaa67e5e5e2f3bf20dbda1511a3dd66c1e2ac3505a47a0a8900cd5c61304","first_computed_at":"2026-05-18T02:42:47.163343Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:42:47.163343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"86M1vnjQNAn+ZVwH4I4Yzv2b276u92YQmF7ypcIGFagOM1I94dx1xZpyHT7yzVU61blWMuZB9bgv0fcAHo9lDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:42:47.163830Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.4283","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ffbac63fd316346ed8f06ba8e17cabd85997dffa38357665711ea71aa9edfcfe","sha256:a48f0cce91a7b747970205266028a10552a816759315834152cc6e6a69a7d22d"],"state_sha256":"96e3c1af39378d0b9925e88dc0200ed9b0df45471f014101a6b0c2c724805437"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/c2uXvPKSpqZFXjnvDXpmypvrm+YeS3ZL/0x//R1nKEdX5xYknfVz/lt7Yj+8GizkzuZw4qN2M1s+9AEJH3dBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T23:16:07.377436Z","bundle_sha256":"769a78e6297472e443b3b527f1c4e9a26e2303f23b999b42fdd04d175323d3ed"}}