{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5XV6KNETNWMCSAJRY57FOS7ZHW","short_pith_number":"pith:5XV6KNET","canonical_record":{"source":{"id":"1412.6768","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-12-21T11:59:50Z","cross_cats_sorted":[],"title_canon_sha256":"16e719ed4b648a8d46654f5d76e977b9a59f3f5517bf68982e08d61cbc6498a2","abstract_canon_sha256":"e22bd134534636e26492f7084669ea1020e8ce74b258daeb77ac154bcdadcd34"},"schema_version":"1.0"},"canonical_sha256":"edebe534936d98290131c77e574bf93db4c948a745681c0662e4ba48a84ff699","source":{"kind":"arxiv","id":"1412.6768","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6768","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6768v1","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6768","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"pith_short_12","alias_value":"5XV6KNETNWMC","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"5XV6KNETNWMCSAJR","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"5XV6KNET","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5XV6KNETNWMCSAJRY57FOS7ZHW","target":"record","payload":{"canonical_record":{"source":{"id":"1412.6768","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-12-21T11:59:50Z","cross_cats_sorted":[],"title_canon_sha256":"16e719ed4b648a8d46654f5d76e977b9a59f3f5517bf68982e08d61cbc6498a2","abstract_canon_sha256":"e22bd134534636e26492f7084669ea1020e8ce74b258daeb77ac154bcdadcd34"},"schema_version":"1.0"},"canonical_sha256":"edebe534936d98290131c77e574bf93db4c948a745681c0662e4ba48a84ff699","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:46.255928Z","signature_b64":"x5lbPZNKmhr4cWLS+Gr5XN9fEPOB7aeQsRQRT1bf3j9IomqDMM9SBU1MPaXgVKzn3HdhlzWIpJwfn0sjkvPbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"edebe534936d98290131c77e574bf93db4c948a745681c0662e4ba48a84ff699","last_reissued_at":"2026-05-18T02:30:46.255529Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:46.255529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.6768","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":"2026-05-18T02:30:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YLST/WRABRaT9THsErsyWG8chyYiPwVo89jIzviskmN/4uhbeR4NCiyUok2UPvoPf9M8k/OnjXs/Xu5/HCCHDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:52:06.445693Z"},"content_sha256":"f8994e568304c4977478243dd1c924d7438bad76815667daa5d2c64a77e77990","schema_version":"1.0","event_id":"sha256:f8994e568304c4977478243dd1c924d7438bad76815667daa5d2c64a77e77990"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5XV6KNETNWMCSAJRY57FOS7ZHW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Construction of invisible conductivity perturbations for the point electrode model in electrical impedance tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AP","authors_text":"Lucas Chesnel, Nuutti Hyv\\\"onen, Stratos Staboulis","submitted_at":"2014-12-21T11:59:50Z","abstract_excerpt":"We explain how to build invisible isotropic conductivity perturbations of the unit conductivity in the framework of the point electrode model for two-dimensional electrical impedance tomography. The theoretical approach, based on solving a fixed point problem, is constructive and allows the implementation of an algorithm for approximating the invisible perturbations. The functionality of the method is demonstrated via numerical examples."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6768","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":"2026-05-18T02:30:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9xcQdvYq9bQzXFb2Bv8aRTjIN8hWEiDS9qFA641PKL2DT1v0IuYa8I5B3u/pdoa0uykdEAQlAkOE26lQb5YyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:52:06.446038Z"},"content_sha256":"d1d0797a99c5d1dd9ed2f4db6f4505ba3a36fa086fb89b61c9cad537be47e5c0","schema_version":"1.0","event_id":"sha256:d1d0797a99c5d1dd9ed2f4db6f4505ba3a36fa086fb89b61c9cad537be47e5c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/bundle.json","state_url":"https://pith.science/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/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":"2026-06-01T16:52:06Z","links":{"resolver":"https://pith.science/pith/5XV6KNETNWMCSAJRY57FOS7ZHW","bundle":"https://pith.science/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/bundle.json","state":"https://pith.science/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5XV6KNETNWMCSAJRY57FOS7ZHW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5XV6KNETNWMCSAJRY57FOS7ZHW","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":"e22bd134534636e26492f7084669ea1020e8ce74b258daeb77ac154bcdadcd34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-12-21T11:59:50Z","title_canon_sha256":"16e719ed4b648a8d46654f5d76e977b9a59f3f5517bf68982e08d61cbc6498a2"},"schema_version":"1.0","source":{"id":"1412.6768","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6768","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6768v1","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6768","created_at":"2026-05-18T02:30:46Z"},{"alias_kind":"pith_short_12","alias_value":"5XV6KNETNWMC","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"5XV6KNETNWMCSAJR","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"5XV6KNET","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:d1d0797a99c5d1dd9ed2f4db6f4505ba3a36fa086fb89b61c9cad537be47e5c0","target":"graph","created_at":"2026-05-18T02:30:46Z","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":"We explain how to build invisible isotropic conductivity perturbations of the unit conductivity in the framework of the point electrode model for two-dimensional electrical impedance tomography. The theoretical approach, based on solving a fixed point problem, is constructive and allows the implementation of an algorithm for approximating the invisible perturbations. The functionality of the method is demonstrated via numerical examples.","authors_text":"Lucas Chesnel, Nuutti Hyv\\\"onen, Stratos Staboulis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-12-21T11:59:50Z","title":"Construction of invisible conductivity perturbations for the point electrode model in electrical impedance tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6768","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:f8994e568304c4977478243dd1c924d7438bad76815667daa5d2c64a77e77990","target":"record","created_at":"2026-05-18T02:30:46Z","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":"e22bd134534636e26492f7084669ea1020e8ce74b258daeb77ac154bcdadcd34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-12-21T11:59:50Z","title_canon_sha256":"16e719ed4b648a8d46654f5d76e977b9a59f3f5517bf68982e08d61cbc6498a2"},"schema_version":"1.0","source":{"id":"1412.6768","kind":"arxiv","version":1}},"canonical_sha256":"edebe534936d98290131c77e574bf93db4c948a745681c0662e4ba48a84ff699","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edebe534936d98290131c77e574bf93db4c948a745681c0662e4ba48a84ff699","first_computed_at":"2026-05-18T02:30:46.255529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:46.255529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x5lbPZNKmhr4cWLS+Gr5XN9fEPOB7aeQsRQRT1bf3j9IomqDMM9SBU1MPaXgVKzn3HdhlzWIpJwfn0sjkvPbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:46.255928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.6768","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f8994e568304c4977478243dd1c924d7438bad76815667daa5d2c64a77e77990","sha256:d1d0797a99c5d1dd9ed2f4db6f4505ba3a36fa086fb89b61c9cad537be47e5c0"],"state_sha256":"a27af98835a6ebcfea76f75234f9d5056afc8746992196bbfb98a4acebcdfe17"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VdiUPwsRHO4bAs+gve3VttLjtcnzEuA6nZ8CEvrWAq6hmegdNCWCUflltqURAZ3XiS3jivzm1cPWSsjbsaw+CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:52:06.447921Z","bundle_sha256":"f7e1e33b6e97c7b74c0a790167511bcda32680563065b2859c2922925c89b3e9"}}