{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:WRLLGSGMU7MUZGPPQA4ZGIXSHH","short_pith_number":"pith:WRLLGSGM","canonical_record":{"source":{"id":"1607.03884","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2016-07-13T19:47:57Z","cross_cats_sorted":["cs.DC","physics.chem-ph"],"title_canon_sha256":"6b7d78e33b05788e647af3804f17f5fe75450f813a0201d69b23185cdbd9268a","abstract_canon_sha256":"6620fda2e9cfa1508d357b919499006664bb83d88f400d3d0dffa0e4c73032f4"},"schema_version":"1.0"},"canonical_sha256":"b456b348cca7d94c99ef80399322f239caee5eb6b10374baf0aa804061387b67","source":{"kind":"arxiv","id":"1607.03884","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.03884","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"arxiv_version","alias_value":"1607.03884v3","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.03884","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"pith_short_12","alias_value":"WRLLGSGMU7MU","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WRLLGSGMU7MUZGPP","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WRLLGSGM","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:WRLLGSGMU7MUZGPPQA4ZGIXSHH","target":"record","payload":{"canonical_record":{"source":{"id":"1607.03884","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2016-07-13T19:47:57Z","cross_cats_sorted":["cs.DC","physics.chem-ph"],"title_canon_sha256":"6b7d78e33b05788e647af3804f17f5fe75450f813a0201d69b23185cdbd9268a","abstract_canon_sha256":"6620fda2e9cfa1508d357b919499006664bb83d88f400d3d0dffa0e4c73032f4"},"schema_version":"1.0"},"canonical_sha256":"b456b348cca7d94c99ef80399322f239caee5eb6b10374baf0aa804061387b67","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:42.903997Z","signature_b64":"R1Y3RqhTa9wqvV+FyXOu371iqsccrWdptycwUAUdUT8CAZFxsB0TIpx2UrxK3/KK6tcoZ0zk/bZrwAnlm39nDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b456b348cca7d94c99ef80399322f239caee5eb6b10374baf0aa804061387b67","last_reissued_at":"2026-05-18T00:47:42.903349Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:42.903349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.03884","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:47:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NpFeZF4MhU1kOvY3MnpAEmoIrOv3R3OJaGeNZPRSyGbc+Gf8xwZ3P8NYQY/RiKSW4aCxQJOL6LjrdaD8cgs9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:58:21.657524Z"},"content_sha256":"687e1f9951b70b673fcd6048db243d96841f6a7a2ad66eced27fb262501c5b61","schema_version":"1.0","event_id":"sha256:687e1f9951b70b673fcd6048db243d96841f6a7a2ad66eced27fb262501c5b61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:WRLLGSGMU7MUZGPPQA4ZGIXSHH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An investigation of GPU-based stiff chemical kinetics integration methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC","physics.chem-ph"],"primary_cat":"physics.comp-ph","authors_text":"Chih-Jen Sung, Kyle E. Niemeyer, Nicholas J. Curtis","submitted_at":"2016-07-13T19:47:57Z","abstract_excerpt":"A fifth-order implicit Runge-Kutta method and two fourth-order exponential integration methods equipped with Krylov subspace approximations were implemented for the GPU and paired with the analytical chemical kinetic Jacobian software pyJac. The performance of each algorithm was evaluated by integrating thermochemical state data sampled from stochastic partially stirred reactor simulations and compared with the commonly used CPU-based implicit integrator CVODE. We estimated that the implicit Runge-Kutta method running on a single GPU is equivalent to CVODE running on 12-38 CPU cores for integr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.03884","kind":"arxiv","version":3},"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":"2026-05-18T00:47:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s6pc6WowR7ybI4CEGCaGsD4RvKyUzJhcWSNm4Qej7htgf8wcIwIPWhcbvknotM5OwJuSnjJnYj2cHkrdc2KEAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:58:21.658274Z"},"content_sha256":"65add4db4780d62157ad841850ba559791d44a36a1ef18d104a259f782518760","schema_version":"1.0","event_id":"sha256:65add4db4780d62157ad841850ba559791d44a36a1ef18d104a259f782518760"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/bundle.json","state_url":"https://pith.science/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/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":"2026-05-27T15:58:21Z","links":{"resolver":"https://pith.science/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH","bundle":"https://pith.science/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/bundle.json","state":"https://pith.science/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WRLLGSGMU7MUZGPPQA4ZGIXSHH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WRLLGSGMU7MUZGPPQA4ZGIXSHH","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":"6620fda2e9cfa1508d357b919499006664bb83d88f400d3d0dffa0e4c73032f4","cross_cats_sorted":["cs.DC","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2016-07-13T19:47:57Z","title_canon_sha256":"6b7d78e33b05788e647af3804f17f5fe75450f813a0201d69b23185cdbd9268a"},"schema_version":"1.0","source":{"id":"1607.03884","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.03884","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"arxiv_version","alias_value":"1607.03884v3","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.03884","created_at":"2026-05-18T00:47:42Z"},{"alias_kind":"pith_short_12","alias_value":"WRLLGSGMU7MU","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WRLLGSGMU7MUZGPP","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WRLLGSGM","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:65add4db4780d62157ad841850ba559791d44a36a1ef18d104a259f782518760","target":"graph","created_at":"2026-05-18T00:47:42Z","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 fifth-order implicit Runge-Kutta method and two fourth-order exponential integration methods equipped with Krylov subspace approximations were implemented for the GPU and paired with the analytical chemical kinetic Jacobian software pyJac. The performance of each algorithm was evaluated by integrating thermochemical state data sampled from stochastic partially stirred reactor simulations and compared with the commonly used CPU-based implicit integrator CVODE. We estimated that the implicit Runge-Kutta method running on a single GPU is equivalent to CVODE running on 12-38 CPU cores for integr","authors_text":"Chih-Jen Sung, Kyle E. Niemeyer, Nicholas J. Curtis","cross_cats":["cs.DC","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2016-07-13T19:47:57Z","title":"An investigation of GPU-based stiff chemical kinetics integration methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.03884","kind":"arxiv","version":3},"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":"sha256:687e1f9951b70b673fcd6048db243d96841f6a7a2ad66eced27fb262501c5b61","target":"record","created_at":"2026-05-18T00:47:42Z","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":"6620fda2e9cfa1508d357b919499006664bb83d88f400d3d0dffa0e4c73032f4","cross_cats_sorted":["cs.DC","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2016-07-13T19:47:57Z","title_canon_sha256":"6b7d78e33b05788e647af3804f17f5fe75450f813a0201d69b23185cdbd9268a"},"schema_version":"1.0","source":{"id":"1607.03884","kind":"arxiv","version":3}},"canonical_sha256":"b456b348cca7d94c99ef80399322f239caee5eb6b10374baf0aa804061387b67","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b456b348cca7d94c99ef80399322f239caee5eb6b10374baf0aa804061387b67","first_computed_at":"2026-05-18T00:47:42.903349Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:42.903349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R1Y3RqhTa9wqvV+FyXOu371iqsccrWdptycwUAUdUT8CAZFxsB0TIpx2UrxK3/KK6tcoZ0zk/bZrwAnlm39nDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:42.903997Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.03884","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:687e1f9951b70b673fcd6048db243d96841f6a7a2ad66eced27fb262501c5b61","sha256:65add4db4780d62157ad841850ba559791d44a36a1ef18d104a259f782518760"],"state_sha256":"6f2290e1d6ef5aa67b243a51930476b9268087c465b2433dbeada8f76bf36517"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0Ru6tNCPi4uyWmqmcGMz4owgdWyshRi+HRdUcIoIjNnwoU8g7hpkRVuFuWy1dQ6w09GzIadoqPtUT7heeGksBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T15:58:21.662256Z","bundle_sha256":"111b0103066097e6aeeaac3a9777a2a581028f23f49064dfe579e4ffb4d930b3"}}