{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PESDCTFXI54ONTFKLXOUX72AMS","short_pith_number":"pith:PESDCTFX","canonical_record":{"source":{"id":"1306.3150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2013-06-13T16:16:46Z","cross_cats_sorted":["math.MP"],"title_canon_sha256":"4cb302055eb8c58049f284f79ccbac0925787bbdc40e0a61df3656599c4d2025","abstract_canon_sha256":"ab635e209efd6bd1aacedf1cdc3b0e05f849106f3971ce8ce9372b8bf0b8c6e9"},"schema_version":"1.0"},"canonical_sha256":"7924314cb74778e6ccaa5ddd4bff406491fc4b5cf45a20bc30210d6193201116","source":{"kind":"arxiv","id":"1306.3150","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.3150","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"arxiv_version","alias_value":"1306.3150v1","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.3150","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"pith_short_12","alias_value":"PESDCTFXI54O","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PESDCTFXI54ONTFK","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PESDCTFX","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PESDCTFXI54ONTFKLXOUX72AMS","target":"record","payload":{"canonical_record":{"source":{"id":"1306.3150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2013-06-13T16:16:46Z","cross_cats_sorted":["math.MP"],"title_canon_sha256":"4cb302055eb8c58049f284f79ccbac0925787bbdc40e0a61df3656599c4d2025","abstract_canon_sha256":"ab635e209efd6bd1aacedf1cdc3b0e05f849106f3971ce8ce9372b8bf0b8c6e9"},"schema_version":"1.0"},"canonical_sha256":"7924314cb74778e6ccaa5ddd4bff406491fc4b5cf45a20bc30210d6193201116","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:59.465072Z","signature_b64":"Wn/x/2zPYUyvC/kWMCEP3Mt2In4vSFSUkB3uWXLlHgrNT0m4Q9j35Aze97yHZZGklK2PNLDvGhqkraB5aRbWAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7924314cb74778e6ccaa5ddd4bff406491fc4b5cf45a20bc30210d6193201116","last_reissued_at":"2026-05-18T03:20:59.464564Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:59.464564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.3150","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":"2026-05-18T03:20:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"enU8+ZoumaEqPP9eViM3eCx1MHzxDFQtl4ai+biG1rYZ2++RdA7OoasvtJNL5c36D4eZmcvBm/zMJBNvaXLzAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T23:14:35.140898Z"},"content_sha256":"ffa66727b8e2573653c9863976705cbed5e6c08e17549ca1d4e6f3fa0f01def9","schema_version":"1.0","event_id":"sha256:ffa66727b8e2573653c9863976705cbed5e6c08e17549ca1d4e6f3fa0f01def9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PESDCTFXI54ONTFKLXOUX72AMS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reconstruction of the refractive index from experimental backscattering data using a globally convergent inverse method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.MP"],"primary_cat":"math-ph","authors_text":"Larisa Beilina, Michael A. Fiddy, Michael V. Klibanov, Nguyen Trung Th\\`anh","submitted_at":"2013-06-13T16:16:46Z","abstract_excerpt":"The problem to be studied in this work is within the context of coefficient identification problems for the wave equation. More precisely, we consider the problem of reconstruction of the refractive index (or equivalently, the dielectric constant) of an inhomogeneous medium using one backscattering boundary measurement. The goal of this paper is to analyze the performance of a globally convergent algorithm of Beilina and Klibanov on experimental data acquired in the Microwave Laboratory at University of North Carolina at Charlotte. The main challenge working with experimental data is the the h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3150","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":"2026-05-18T03:20:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ZvzKYu+4BYFRcnOv3DxwiNNKmLgEFNq2/L56QqEyk+96sIwx3ICfqwP3qZKrk7t72Xm5ODKol35KLDO69gfBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T23:14:35.141244Z"},"content_sha256":"3e2db265e7b6c2830ebd88898260da3c635e017bb7ff571eea7c24010ba291df","schema_version":"1.0","event_id":"sha256:3e2db265e7b6c2830ebd88898260da3c635e017bb7ff571eea7c24010ba291df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PESDCTFXI54ONTFKLXOUX72AMS/bundle.json","state_url":"https://pith.science/pith/PESDCTFXI54ONTFKLXOUX72AMS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PESDCTFXI54ONTFKLXOUX72AMS/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":"2026-06-03T23:14:35Z","links":{"resolver":"https://pith.science/pith/PESDCTFXI54ONTFKLXOUX72AMS","bundle":"https://pith.science/pith/PESDCTFXI54ONTFKLXOUX72AMS/bundle.json","state":"https://pith.science/pith/PESDCTFXI54ONTFKLXOUX72AMS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PESDCTFXI54ONTFKLXOUX72AMS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PESDCTFXI54ONTFKLXOUX72AMS","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":"ab635e209efd6bd1aacedf1cdc3b0e05f849106f3971ce8ce9372b8bf0b8c6e9","cross_cats_sorted":["math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2013-06-13T16:16:46Z","title_canon_sha256":"4cb302055eb8c58049f284f79ccbac0925787bbdc40e0a61df3656599c4d2025"},"schema_version":"1.0","source":{"id":"1306.3150","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.3150","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"arxiv_version","alias_value":"1306.3150v1","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.3150","created_at":"2026-05-18T03:20:59Z"},{"alias_kind":"pith_short_12","alias_value":"PESDCTFXI54O","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PESDCTFXI54ONTFK","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PESDCTFX","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:3e2db265e7b6c2830ebd88898260da3c635e017bb7ff571eea7c24010ba291df","target":"graph","created_at":"2026-05-18T03:20:59Z","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":"The problem to be studied in this work is within the context of coefficient identification problems for the wave equation. More precisely, we consider the problem of reconstruction of the refractive index (or equivalently, the dielectric constant) of an inhomogeneous medium using one backscattering boundary measurement. The goal of this paper is to analyze the performance of a globally convergent algorithm of Beilina and Klibanov on experimental data acquired in the Microwave Laboratory at University of North Carolina at Charlotte. The main challenge working with experimental data is the the h","authors_text":"Larisa Beilina, Michael A. Fiddy, Michael V. Klibanov, Nguyen Trung Th\\`anh","cross_cats":["math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2013-06-13T16:16:46Z","title":"Reconstruction of the refractive index from experimental backscattering data using a globally convergent inverse method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3150","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:ffa66727b8e2573653c9863976705cbed5e6c08e17549ca1d4e6f3fa0f01def9","target":"record","created_at":"2026-05-18T03:20:59Z","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":"ab635e209efd6bd1aacedf1cdc3b0e05f849106f3971ce8ce9372b8bf0b8c6e9","cross_cats_sorted":["math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2013-06-13T16:16:46Z","title_canon_sha256":"4cb302055eb8c58049f284f79ccbac0925787bbdc40e0a61df3656599c4d2025"},"schema_version":"1.0","source":{"id":"1306.3150","kind":"arxiv","version":1}},"canonical_sha256":"7924314cb74778e6ccaa5ddd4bff406491fc4b5cf45a20bc30210d6193201116","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7924314cb74778e6ccaa5ddd4bff406491fc4b5cf45a20bc30210d6193201116","first_computed_at":"2026-05-18T03:20:59.464564Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:20:59.464564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wn/x/2zPYUyvC/kWMCEP3Mt2In4vSFSUkB3uWXLlHgrNT0m4Q9j35Aze97yHZZGklK2PNLDvGhqkraB5aRbWAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:20:59.465072Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.3150","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ffa66727b8e2573653c9863976705cbed5e6c08e17549ca1d4e6f3fa0f01def9","sha256:3e2db265e7b6c2830ebd88898260da3c635e017bb7ff571eea7c24010ba291df"],"state_sha256":"c2d73cfc91396f15be8e73faae864d242db0648ee0f73f16bf6dec89bc6fe54e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kczkJn+SDobwkXfea4ud0rb/MNxDimw9ogOAd2hT0TduXls3AeFLEOtqS5j+gPXbA+YPuEuqptso9t0RzyEUCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T23:14:35.143175Z","bundle_sha256":"c3662ee51915cf1b6eb402a6cf2bc19af130edbc6e13f363a044911d903382fd"}}