{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:PLEY3MDW5RCXZAXP7JOXZYJZ5C","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":"a0ea233116fba3a403bbad005bc58e230defbe828d3fc4391f49de727f2cab15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2016-05-25T10:40:02Z","title_canon_sha256":"0813d6f84163ac286deb986e4e907bbe27afe174f4836ac68ec009064fac7d8d"},"schema_version":"1.0","source":{"id":"1605.07817","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.07817","created_at":"2026-05-18T00:57:30Z"},{"alias_kind":"arxiv_version","alias_value":"1605.07817v2","created_at":"2026-05-18T00:57:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.07817","created_at":"2026-05-18T00:57:30Z"},{"alias_kind":"pith_short_12","alias_value":"PLEY3MDW5RCX","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PLEY3MDW5RCXZAXP","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PLEY3MDW","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:d7a2a51c7c7bed48caa41b4473c34cbff6b5d672b1ef807dcde0d3ef76e4f573","target":"graph","created_at":"2026-05-18T00:57:30Z","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 study an inverse initial source problem that models Photoacoustic tomography measurements with array detectors, and introduce a method that can be viewed as a modification of the so called back and forth nudging method. We show that the method converges at an exponential rate under a natural visibility condition, with data given only on a part of the boundary of the domain of wave propagation. In this paper we consider the case of noiseless measurements.","authors_text":"Lauri Oksanen, Olga Chervova","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2016-05-25T10:40:02Z","title":"Time reversal method with stabilizing boundary conditions for Photoacoustic tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.07817","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":"sha256:1c26e27edb495f8388363c675b044db0f725b48fd71176780e1cec7aa1a01d8d","target":"record","created_at":"2026-05-18T00:57:30Z","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":"a0ea233116fba3a403bbad005bc58e230defbe828d3fc4391f49de727f2cab15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2016-05-25T10:40:02Z","title_canon_sha256":"0813d6f84163ac286deb986e4e907bbe27afe174f4836ac68ec009064fac7d8d"},"schema_version":"1.0","source":{"id":"1605.07817","kind":"arxiv","version":2}},"canonical_sha256":"7ac98db076ec457c82effa5d7ce139e88378ccce38a368a7e6dddbee9ba3e966","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ac98db076ec457c82effa5d7ce139e88378ccce38a368a7e6dddbee9ba3e966","first_computed_at":"2026-05-18T00:57:30.866978Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:30.866978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dbc8jSwJBqdWi8ajaH/f/iIl3k3l3k1tDuN3iPG/XuiV4JOmk0ThTXwcZ8AGW4TeTHFy41DTZ9iuyiJcxk97BA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:30.867454Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.07817","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c26e27edb495f8388363c675b044db0f725b48fd71176780e1cec7aa1a01d8d","sha256:d7a2a51c7c7bed48caa41b4473c34cbff6b5d672b1ef807dcde0d3ef76e4f573"],"state_sha256":"88f6947fa46a5ea4b144dd5c3f9bcbc9ad3c3014b3745bf2c897df7a1a8a05f8"}