{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SCBXFIN5D7XF75BSXYNSB5RCNY","short_pith_number":"pith:SCBXFIN5","canonical_record":{"source":{"id":"1906.00785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MS","submitted_at":"2019-06-03T13:22:27Z","cross_cats_sorted":[],"title_canon_sha256":"7d0f591909c544fa9f691a29c18b07f9a1bfd6a9958a67936414dca981da60e6","abstract_canon_sha256":"5d38232c2bff993ac26bf8e875c225d85bde41683c72c65005cff0413be3e3d8"},"schema_version":"1.0"},"canonical_sha256":"908372a1bd1fee5ff432be1b20f6226e18fe29d634a1ab1c7b228c5860f1d958","source":{"kind":"arxiv","id":"1906.00785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00785","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00785v1","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00785","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"pith_short_12","alias_value":"SCBXFIN5D7XF","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SCBXFIN5D7XF75BS","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SCBXFIN5","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SCBXFIN5D7XF75BSXYNSB5RCNY","target":"record","payload":{"canonical_record":{"source":{"id":"1906.00785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MS","submitted_at":"2019-06-03T13:22:27Z","cross_cats_sorted":[],"title_canon_sha256":"7d0f591909c544fa9f691a29c18b07f9a1bfd6a9958a67936414dca981da60e6","abstract_canon_sha256":"5d38232c2bff993ac26bf8e875c225d85bde41683c72c65005cff0413be3e3d8"},"schema_version":"1.0"},"canonical_sha256":"908372a1bd1fee5ff432be1b20f6226e18fe29d634a1ab1c7b228c5860f1d958","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:23.929252Z","signature_b64":"X4Lw9s1foHTauUZLitSarfMUHY4zk8MHaBPQmnPO8ItJOmw1N7rGcreJZj38EglKhWsLNFVgQk+2Yc4MTaUzCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"908372a1bd1fee5ff432be1b20f6226e18fe29d634a1ab1c7b228c5860f1d958","last_reissued_at":"2026-05-17T23:44:23.928632Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:23.928632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.00785","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":"2026-05-17T23:44:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RNFb10+5rotewIYdN5rVuq4JDOe5gVyfAldM6NoAsyeTK3EF9j3lKkxvyhIJVK32bNAt9pUcXNrdwQO6mlXSCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:16:10.203077Z"},"content_sha256":"25a04cb954b32c17bbd24df7c4eed8e1a9e3c20590580ac27601bb6cdebfb9a3","schema_version":"1.0","event_id":"sha256:25a04cb954b32c17bbd24df7c4eed8e1a9e3c20590580ac27601bb6cdebfb9a3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SCBXFIN5D7XF75BSXYNSB5RCNY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bembel: The Fast Isogeometric Boundary Element C++ Library for Laplace, Helmholtz, and Electric Wave Equation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.MS","authors_text":"F. Wolf, H. Harbrecht, J. D\\\"olz, M. Multerer, S. Kurz, S. Sch\\\"ops","submitted_at":"2019-06-03T13:22:27Z","abstract_excerpt":"In this article, we present Bembel, the C++ library featuring higher order isogeometric Galerkin boundary element methods for Laplace, Helmholtz, and Maxwell problems. Bembel is compatible with geometries from the Octave NURBS package and provides an interface to the Eigen template library for linear algebra operations. For computational efficiency, it applies an embedded fast multipole method tailored to the isogeometric analysis framework and a parallel matrix assembly based on OpenMP."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00785","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":"2026-05-17T23:44:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kkeoWo/r4ooxY9cPHYDngfK1L9Oh2Uz551vchrsJTB+p2wui8PiwcyuOHcWYaS1/b5Ye3uA8HHodmtmIariEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:16:10.203430Z"},"content_sha256":"2c3341773c1fa745c632b334be5714f2394b73a957db46eabf2354e7ad7d1013","schema_version":"1.0","event_id":"sha256:2c3341773c1fa745c632b334be5714f2394b73a957db46eabf2354e7ad7d1013"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/bundle.json","state_url":"https://pith.science/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/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":"2026-06-04T23:16:10Z","links":{"resolver":"https://pith.science/pith/SCBXFIN5D7XF75BSXYNSB5RCNY","bundle":"https://pith.science/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/bundle.json","state":"https://pith.science/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SCBXFIN5D7XF75BSXYNSB5RCNY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SCBXFIN5D7XF75BSXYNSB5RCNY","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":"5d38232c2bff993ac26bf8e875c225d85bde41683c72c65005cff0413be3e3d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MS","submitted_at":"2019-06-03T13:22:27Z","title_canon_sha256":"7d0f591909c544fa9f691a29c18b07f9a1bfd6a9958a67936414dca981da60e6"},"schema_version":"1.0","source":{"id":"1906.00785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00785","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00785v1","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00785","created_at":"2026-05-17T23:44:23Z"},{"alias_kind":"pith_short_12","alias_value":"SCBXFIN5D7XF","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SCBXFIN5D7XF75BS","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SCBXFIN5","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:2c3341773c1fa745c632b334be5714f2394b73a957db46eabf2354e7ad7d1013","target":"graph","created_at":"2026-05-17T23:44:23Z","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":"In this article, we present Bembel, the C++ library featuring higher order isogeometric Galerkin boundary element methods for Laplace, Helmholtz, and Maxwell problems. Bembel is compatible with geometries from the Octave NURBS package and provides an interface to the Eigen template library for linear algebra operations. For computational efficiency, it applies an embedded fast multipole method tailored to the isogeometric analysis framework and a parallel matrix assembly based on OpenMP.","authors_text":"F. Wolf, H. Harbrecht, J. D\\\"olz, M. Multerer, S. Kurz, S. Sch\\\"ops","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MS","submitted_at":"2019-06-03T13:22:27Z","title":"Bembel: The Fast Isogeometric Boundary Element C++ Library for Laplace, Helmholtz, and Electric Wave Equation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00785","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":"sha256:25a04cb954b32c17bbd24df7c4eed8e1a9e3c20590580ac27601bb6cdebfb9a3","target":"record","created_at":"2026-05-17T23:44:23Z","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":"5d38232c2bff993ac26bf8e875c225d85bde41683c72c65005cff0413be3e3d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MS","submitted_at":"2019-06-03T13:22:27Z","title_canon_sha256":"7d0f591909c544fa9f691a29c18b07f9a1bfd6a9958a67936414dca981da60e6"},"schema_version":"1.0","source":{"id":"1906.00785","kind":"arxiv","version":1}},"canonical_sha256":"908372a1bd1fee5ff432be1b20f6226e18fe29d634a1ab1c7b228c5860f1d958","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"908372a1bd1fee5ff432be1b20f6226e18fe29d634a1ab1c7b228c5860f1d958","first_computed_at":"2026-05-17T23:44:23.928632Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:23.928632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X4Lw9s1foHTauUZLitSarfMUHY4zk8MHaBPQmnPO8ItJOmw1N7rGcreJZj38EglKhWsLNFVgQk+2Yc4MTaUzCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:23.929252Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.00785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25a04cb954b32c17bbd24df7c4eed8e1a9e3c20590580ac27601bb6cdebfb9a3","sha256:2c3341773c1fa745c632b334be5714f2394b73a957db46eabf2354e7ad7d1013"],"state_sha256":"62b973e4588d3c91d82aa89d0e073d1a957ccabc2b8f5a06cd92314e4747e624"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SJggE96+SBvx6s+0rByMkiOcWm3tgCix2zrnkpGlIPfa7zzoGWUqCqyx9nLJmOAM/56Tg3hCegKsEqt21EJjCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T23:16:10.205964Z","bundle_sha256":"05cbf3a41e1d985285618644d841db1d552e917b39918146a4f77f2a5a8c1dbf"}}