{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DT4YY5DS347ZXRV7ZS3FK5X5YA","short_pith_number":"pith:DT4YY5DS","canonical_record":{"source":{"id":"1511.04892","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-16T10:13:34Z","cross_cats_sorted":["math.NA","q-bio.NC"],"title_canon_sha256":"b6d4b5523b3a7d9e9bc87b929aca23c7810160dfc6580c818d3b7d0f6a01feb6","abstract_canon_sha256":"ab4842639e3c2ce1489e7fdd031e3b9612836be719832e4db4f4296e6a94d09c"},"schema_version":"1.0"},"canonical_sha256":"1cf98c7472df3f9bc6bfccb65576fdc00af92f994056e17b602861dded862283","source":{"kind":"arxiv","id":"1511.04892","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04892","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04892v2","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04892","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"pith_short_12","alias_value":"DT4YY5DS347Z","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DT4YY5DS347ZXRV7","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DT4YY5DS","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DT4YY5DS347ZXRV7ZS3FK5X5YA","target":"record","payload":{"canonical_record":{"source":{"id":"1511.04892","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-16T10:13:34Z","cross_cats_sorted":["math.NA","q-bio.NC"],"title_canon_sha256":"b6d4b5523b3a7d9e9bc87b929aca23c7810160dfc6580c818d3b7d0f6a01feb6","abstract_canon_sha256":"ab4842639e3c2ce1489e7fdd031e3b9612836be719832e4db4f4296e6a94d09c"},"schema_version":"1.0"},"canonical_sha256":"1cf98c7472df3f9bc6bfccb65576fdc00af92f994056e17b602861dded862283","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:58:55.420683Z","signature_b64":"N/tci1cESnssSNUl6OdQFEeMjyLlnTwkZOKinWEecL1qS6LPFijOGYwdfOp9uGUS8K7SkAT1u0BrZZ4mwLRPCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1cf98c7472df3f9bc6bfccb65576fdc00af92f994056e17b602861dded862283","last_reissued_at":"2026-05-18T00:58:55.420199Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:58:55.420199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.04892","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:58:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vtzif9hfmd7GA4bvX77xtpJ8xi2vhniWDVngykoyMNPjd0Gb1hrTQbdoRGk793CMBvtrGhXdozQRcvSq4prKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T02:27:44.367237Z"},"content_sha256":"5c8f7271320dd6352cdf38bd1a14a75a3e090aee6bf8db0de19026d5d033fe0f","schema_version":"1.0","event_id":"sha256:5c8f7271320dd6352cdf38bd1a14a75a3e090aee6bf8db0de19026d5d033fe0f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DT4YY5DS347ZXRV7ZS3FK5X5YA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A discontinuous Galerkin Method for the EEG Forward Problem using the Subtraction Approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.NA","q-bio.NC"],"primary_cat":"cs.CE","authors_text":"Carsten H. Wolters, Christian Engwer, Jakob Ludewig, Johannes Vorwerk","submitted_at":"2015-11-16T10:13:34Z","abstract_excerpt":"In order to perform electroencephalography (EEG) source reconstruction, i.e., to localize the sources underlying a measured EEG, the electric potential distribution at the electrodes generated by a dipolar current source in the brain has to be simulated, which is the so-called EEG forward problem. To solve it accurately, it is necessary to apply numerical methods that are able to take the individual geometry and conductivity distribution of the subject's head into account. In this context, the finite element method (FEM) has shown high numerical accuracy with the possibility to model complex g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04892","kind":"arxiv","version":2},"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":"2026-05-18T00:58:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ohjZQzL8jxsf4VD9RXoeeXZkRIdfK0BTDSCRRhAuWB2/CbDUAINOmrtphaSN4xRkxKC4AY9jW+SdR7YpWu6PAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T02:27:44.367944Z"},"content_sha256":"26d59888ab22bd9e77f8f4c1c174b9816389c3e037d984f6e7a2d47cf0a2b5d2","schema_version":"1.0","event_id":"sha256:26d59888ab22bd9e77f8f4c1c174b9816389c3e037d984f6e7a2d47cf0a2b5d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/bundle.json","state_url":"https://pith.science/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/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":"2026-05-22T02:27:44Z","links":{"resolver":"https://pith.science/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA","bundle":"https://pith.science/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/bundle.json","state":"https://pith.science/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DT4YY5DS347ZXRV7ZS3FK5X5YA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DT4YY5DS347ZXRV7ZS3FK5X5YA","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":"ab4842639e3c2ce1489e7fdd031e3b9612836be719832e4db4f4296e6a94d09c","cross_cats_sorted":["math.NA","q-bio.NC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-16T10:13:34Z","title_canon_sha256":"b6d4b5523b3a7d9e9bc87b929aca23c7810160dfc6580c818d3b7d0f6a01feb6"},"schema_version":"1.0","source":{"id":"1511.04892","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04892","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04892v2","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04892","created_at":"2026-05-18T00:58:55Z"},{"alias_kind":"pith_short_12","alias_value":"DT4YY5DS347Z","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DT4YY5DS347ZXRV7","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DT4YY5DS","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:26d59888ab22bd9e77f8f4c1c174b9816389c3e037d984f6e7a2d47cf0a2b5d2","target":"graph","created_at":"2026-05-18T00:58:55Z","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 order to perform electroencephalography (EEG) source reconstruction, i.e., to localize the sources underlying a measured EEG, the electric potential distribution at the electrodes generated by a dipolar current source in the brain has to be simulated, which is the so-called EEG forward problem. To solve it accurately, it is necessary to apply numerical methods that are able to take the individual geometry and conductivity distribution of the subject's head into account. In this context, the finite element method (FEM) has shown high numerical accuracy with the possibility to model complex g","authors_text":"Carsten H. Wolters, Christian Engwer, Jakob Ludewig, Johannes Vorwerk","cross_cats":["math.NA","q-bio.NC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-16T10:13:34Z","title":"A discontinuous Galerkin Method for the EEG Forward Problem using the Subtraction Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04892","kind":"arxiv","version":2},"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":"sha256:5c8f7271320dd6352cdf38bd1a14a75a3e090aee6bf8db0de19026d5d033fe0f","target":"record","created_at":"2026-05-18T00:58:55Z","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":"ab4842639e3c2ce1489e7fdd031e3b9612836be719832e4db4f4296e6a94d09c","cross_cats_sorted":["math.NA","q-bio.NC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-16T10:13:34Z","title_canon_sha256":"b6d4b5523b3a7d9e9bc87b929aca23c7810160dfc6580c818d3b7d0f6a01feb6"},"schema_version":"1.0","source":{"id":"1511.04892","kind":"arxiv","version":2}},"canonical_sha256":"1cf98c7472df3f9bc6bfccb65576fdc00af92f994056e17b602861dded862283","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1cf98c7472df3f9bc6bfccb65576fdc00af92f994056e17b602861dded862283","first_computed_at":"2026-05-18T00:58:55.420199Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:55.420199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N/tci1cESnssSNUl6OdQFEeMjyLlnTwkZOKinWEecL1qS6LPFijOGYwdfOp9uGUS8K7SkAT1u0BrZZ4mwLRPCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:55.420683Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.04892","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c8f7271320dd6352cdf38bd1a14a75a3e090aee6bf8db0de19026d5d033fe0f","sha256:26d59888ab22bd9e77f8f4c1c174b9816389c3e037d984f6e7a2d47cf0a2b5d2"],"state_sha256":"1949ccea465d474f9c4fe6801db35d339c4ff62865654dca959428b757b54835"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FF1+DbVyNkI6SEZE6LPPfAYPgqFeav+2t92pD+JVG7qu7Bvcs36kWhFL/NtL+VOJVO35Nq3ZUTBV7t5WSL9ABQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T02:27:44.371561Z","bundle_sha256":"45d47a535b7cde5654c5274f1af956ed5497751d82f6fe4c5f0ad08841a0bf2a"}}