{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:56E63ZMZ7X6TW4VLKH33CK4JOM","short_pith_number":"pith:56E63ZMZ","canonical_record":{"source":{"id":"1712.08009","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-12-21T15:23:28Z","cross_cats_sorted":["cs.NA"],"title_canon_sha256":"2a9ac5af79b423d184720120dcb85475badc32ec9e7a20b49ec01e7c5563f925","abstract_canon_sha256":"66fe725f5c23f5dcd93b413f2bf28f518b9f1f07fd934fb3b8e5ef1aa29ee5ed"},"schema_version":"1.0"},"canonical_sha256":"ef89ede599fdfd3b72ab51f7b12b89732ce60220e2849e83224c89c67617db07","source":{"kind":"arxiv","id":"1712.08009","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.08009","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"arxiv_version","alias_value":"1712.08009v2","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.08009","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_12","alias_value":"56E63ZMZ7X6T","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_16","alias_value":"56E63ZMZ7X6TW4VL","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_8","alias_value":"56E63ZMZ","created_at":"2026-06-04T19:11:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:56E63ZMZ7X6TW4VLKH33CK4JOM","target":"record","payload":{"canonical_record":{"source":{"id":"1712.08009","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-12-21T15:23:28Z","cross_cats_sorted":["cs.NA"],"title_canon_sha256":"2a9ac5af79b423d184720120dcb85475badc32ec9e7a20b49ec01e7c5563f925","abstract_canon_sha256":"66fe725f5c23f5dcd93b413f2bf28f518b9f1f07fd934fb3b8e5ef1aa29ee5ed"},"schema_version":"1.0"},"canonical_sha256":"ef89ede599fdfd3b72ab51f7b12b89732ce60220e2849e83224c89c67617db07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T19:11:21.873846Z","signature_b64":"9x7UKxIKO3bERRYvtPS497NM7DrrM88TAIRqseu0e0rtuu1wj9QZha0XEqJjjBXND8NNiEMNtNsGqKStzXq5CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ef89ede599fdfd3b72ab51f7b12b89732ce60220e2849e83224c89c67617db07","last_reissued_at":"2026-06-04T19:11:21.873425Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T19:11:21.873425Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.08009","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":"2026-06-04T19:11:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eKwj+OaJCqzJb2ZJDPXmoLKLyhXTICpxVFolEiJciSqN3JDRW9wQXNRRnuMROi6aiSdZJOs2ts9wWFes+TnCAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:25:47.619988Z"},"content_sha256":"58f1489efa77610b1a30c8423304f0b3acf83b367b6218aac15e7454a9bc76cc","schema_version":"1.0","event_id":"sha256:58f1489efa77610b1a30c8423304f0b3acf83b367b6218aac15e7454a9bc76cc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:56E63ZMZ7X6TW4VLKH33CK4JOM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Limited Angle Acousto-Electrical Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.NA"],"primary_cat":"math.NA","authors_text":"Changyou Li, Ekaterina Sherina, Kim Knudsen, Simon Hubmer","submitted_at":"2017-12-21T15:23:28Z","abstract_excerpt":"This paper considers the reconstruction problem in Acousto-Electrical Tomography, i.e., the problem of estimating a spatially varying conductivity in a bounded domain from measurements of the internal power densities resulting from different prescribed boundary conditions. Particular emphasis is placed on the limited angle scenario, in which the boundary conditions are supported only on a part of the boundary. The reconstruction problem is formulated as an optimization problem in a Hilbert space setting and solved using Landweber iteration. The resulting algorithm is implemented numerically in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.08009","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1712.08009/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":"2026-06-04T19:11:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n7ps2seYx7awzXPJ1Qse074BPA/ExvsKKEOPSqBTGQ9rSwJpyWo79kKhBYd3ZhI8BPUkfMlSACEFRxGMenUCBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:25:47.620379Z"},"content_sha256":"71b16c9c7cbc3f78f510e40fc62300544c3a3652c3e7d6dca2c0354de5fd402a","schema_version":"1.0","event_id":"sha256:71b16c9c7cbc3f78f510e40fc62300544c3a3652c3e7d6dca2c0354de5fd402a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/bundle.json","state_url":"https://pith.science/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/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":"2026-06-06T19:25:47Z","links":{"resolver":"https://pith.science/pith/56E63ZMZ7X6TW4VLKH33CK4JOM","bundle":"https://pith.science/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/bundle.json","state":"https://pith.science/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/56E63ZMZ7X6TW4VLKH33CK4JOM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:56E63ZMZ7X6TW4VLKH33CK4JOM","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":"66fe725f5c23f5dcd93b413f2bf28f518b9f1f07fd934fb3b8e5ef1aa29ee5ed","cross_cats_sorted":["cs.NA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-12-21T15:23:28Z","title_canon_sha256":"2a9ac5af79b423d184720120dcb85475badc32ec9e7a20b49ec01e7c5563f925"},"schema_version":"1.0","source":{"id":"1712.08009","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.08009","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"arxiv_version","alias_value":"1712.08009v2","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.08009","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_12","alias_value":"56E63ZMZ7X6T","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_16","alias_value":"56E63ZMZ7X6TW4VL","created_at":"2026-06-04T19:11:21Z"},{"alias_kind":"pith_short_8","alias_value":"56E63ZMZ","created_at":"2026-06-04T19:11:21Z"}],"graph_snapshots":[{"event_id":"sha256:71b16c9c7cbc3f78f510e40fc62300544c3a3652c3e7d6dca2c0354de5fd402a","target":"graph","created_at":"2026-06-04T19:11:21Z","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/1712.08009/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper considers the reconstruction problem in Acousto-Electrical Tomography, i.e., the problem of estimating a spatially varying conductivity in a bounded domain from measurements of the internal power densities resulting from different prescribed boundary conditions. Particular emphasis is placed on the limited angle scenario, in which the boundary conditions are supported only on a part of the boundary. The reconstruction problem is formulated as an optimization problem in a Hilbert space setting and solved using Landweber iteration. The resulting algorithm is implemented numerically in","authors_text":"Changyou Li, Ekaterina Sherina, Kim Knudsen, Simon Hubmer","cross_cats":["cs.NA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-12-21T15:23:28Z","title":"Limited Angle Acousto-Electrical Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.08009","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":"sha256:58f1489efa77610b1a30c8423304f0b3acf83b367b6218aac15e7454a9bc76cc","target":"record","created_at":"2026-06-04T19:11:21Z","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":"66fe725f5c23f5dcd93b413f2bf28f518b9f1f07fd934fb3b8e5ef1aa29ee5ed","cross_cats_sorted":["cs.NA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2017-12-21T15:23:28Z","title_canon_sha256":"2a9ac5af79b423d184720120dcb85475badc32ec9e7a20b49ec01e7c5563f925"},"schema_version":"1.0","source":{"id":"1712.08009","kind":"arxiv","version":2}},"canonical_sha256":"ef89ede599fdfd3b72ab51f7b12b89732ce60220e2849e83224c89c67617db07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ef89ede599fdfd3b72ab51f7b12b89732ce60220e2849e83224c89c67617db07","first_computed_at":"2026-06-04T19:11:21.873425Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T19:11:21.873425Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9x7UKxIKO3bERRYvtPS497NM7DrrM88TAIRqseu0e0rtuu1wj9QZha0XEqJjjBXND8NNiEMNtNsGqKStzXq5CA==","signature_status":"signed_v1","signed_at":"2026-06-04T19:11:21.873846Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.08009","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58f1489efa77610b1a30c8423304f0b3acf83b367b6218aac15e7454a9bc76cc","sha256:71b16c9c7cbc3f78f510e40fc62300544c3a3652c3e7d6dca2c0354de5fd402a"],"state_sha256":"2329a540999aba7baf4553fa4420f87f63407722277d81405d14b15503fe9c70"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rsJFWLvyDL5du5fOZVCBtUIeIaKy/ASMEvukHnVYD2hHTVqkDJzlqcUipHji6WFj3HuV+8Z+0U9zlS0SBDCPAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:25:47.622625Z","bundle_sha256":"4c69831e983a1104ad2dc485b7537352254d8bd75bc444fb1f29c45dcf157a9a"}}