{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OC5DJCC5BAQ3SKXKFCI2JKPPDO","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":"5a8de7216a2ae7e409a23bf07fda6074e403ec4e93103bcf8cb0b304b50b545b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2018-07-06T09:00:57Z","title_canon_sha256":"ea72ac52158ee76f7659cae7994c2cd059bd31adf805f7fc47f7f4d2679e13ab"},"schema_version":"1.0","source":{"id":"1807.02318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.02318","created_at":"2026-05-18T00:11:22Z"},{"alias_kind":"arxiv_version","alias_value":"1807.02318v1","created_at":"2026-05-18T00:11:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.02318","created_at":"2026-05-18T00:11:22Z"},{"alias_kind":"pith_short_12","alias_value":"OC5DJCC5BAQ3","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OC5DJCC5BAQ3SKXK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OC5DJCC5","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:ead829616ef2de8b648fc806bec102640a325ccb5aeac5958afc01e09e07dde9","target":"graph","created_at":"2026-05-18T00:11:22Z","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":"An inverse obstacle problem for the wave governed by the wave equation in a two layered medium is considered under the framework of the time domain enclosure method. The wave is generated by an initial data supported on a closed ball in the upper half-space, and observed on the same ball over a finite time interval. The unknown obstacle is penetrable and embedded in the lower half-space. It is assumed that the propagation speed of the wave in the upper half-space is greater than that of the wave in the lower half-space, which is excluded in the previous study: Ikehata and Kawashita (2018) to a","authors_text":"Masaru Ikehata, Mishio Kawashita, Wakako Kawashita","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2018-07-06T09:00:57Z","title":"A study on finding a buried obstacle in a layered medium having the influence of the total reflection phenomena via the time domain enclosure method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.02318","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:a21e709ddbbe2e13338aaf582cc81906a2a818c1530e3375aee0e7b381ed7e00","target":"record","created_at":"2026-05-18T00:11:22Z","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":"5a8de7216a2ae7e409a23bf07fda6074e403ec4e93103bcf8cb0b304b50b545b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2018-07-06T09:00:57Z","title_canon_sha256":"ea72ac52158ee76f7659cae7994c2cd059bd31adf805f7fc47f7f4d2679e13ab"},"schema_version":"1.0","source":{"id":"1807.02318","kind":"arxiv","version":1}},"canonical_sha256":"70ba34885d0821b92aea2891a4a9ef1bab504fda43c99978c9a70c63dcb3ea6f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"70ba34885d0821b92aea2891a4a9ef1bab504fda43c99978c9a70c63dcb3ea6f","first_computed_at":"2026-05-18T00:11:22.408808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:22.408808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S9vdCGUmmoVNF/T9oipDoziVVbGUufel3tk+1mzhSOCcIpRf8qJITqb6yFpZO6WZxcYcGGpUSDqKOiyd7PtQCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:22.409400Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.02318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a21e709ddbbe2e13338aaf582cc81906a2a818c1530e3375aee0e7b381ed7e00","sha256:ead829616ef2de8b648fc806bec102640a325ccb5aeac5958afc01e09e07dde9"],"state_sha256":"4e767e0a58725324eea7fa5e6d7064746c3e70dd662d6dadf1204c66166c56aa"}