{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:W4SCXBDVO2GTHCDV75YYPXS3UG","short_pith_number":"pith:W4SCXBDV","canonical_record":{"source":{"id":"1411.5810","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2014-11-21T09:52:23Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d3079e68d8ac085613368d9364ab40dda85ac3beffa54a6d6c977c8e6c26e82f","abstract_canon_sha256":"709421a0df623096b5fb1e50d89e9d583f6501f8108d943e261cca930718396e"},"schema_version":"1.0"},"canonical_sha256":"b7242b8475768d338875ff7187de5ba18be792eba989d4406940f22dc6549cc7","source":{"kind":"arxiv","id":"1411.5810","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.5810","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"arxiv_version","alias_value":"1411.5810v1","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.5810","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"pith_short_12","alias_value":"W4SCXBDVO2GT","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"W4SCXBDVO2GTHCDV","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"W4SCXBDV","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:W4SCXBDVO2GTHCDV75YYPXS3UG","target":"record","payload":{"canonical_record":{"source":{"id":"1411.5810","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2014-11-21T09:52:23Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d3079e68d8ac085613368d9364ab40dda85ac3beffa54a6d6c977c8e6c26e82f","abstract_canon_sha256":"709421a0df623096b5fb1e50d89e9d583f6501f8108d943e261cca930718396e"},"schema_version":"1.0"},"canonical_sha256":"b7242b8475768d338875ff7187de5ba18be792eba989d4406940f22dc6549cc7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:28.600522Z","signature_b64":"4BPbfrMAwnTZkBLZliU7Exn6d9eR/B+Cb3t5wnnH+/ps8InnLKqxqYoVodxynHIZHBWYX1q9gIKyA089PxXHBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7242b8475768d338875ff7187de5ba18be792eba989d4406940f22dc6549cc7","last_reissued_at":"2026-05-18T01:41:28.599830Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:28.599830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.5810","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":"2026-05-18T01:41:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xMUdzIMbNubFelwMg/Nobdyvhtz+kt8aeaNS8KyBj6PqrzVDZPVWYD8Hku0vfBlAStOvM50qFkXTWwNyLTJUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:46:03.097846Z"},"content_sha256":"13c88be9744747695e784d697002f96e6a003bc7174794407261f1991e52c537","schema_version":"1.0","event_id":"sha256:13c88be9744747695e784d697002f96e6a003bc7174794407261f1991e52c537"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:W4SCXBDVO2GTHCDV75YYPXS3UG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experiments on Maxwell's Fish-eye dynamics in elastic plates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.class-ph","authors_text":"Gautier Lefebvre, Marc Dubois, Patrick Sebbah, Romain Beauvais, Ros Kiri Ing, Younes Achaoui","submitted_at":"2014-11-21T09:52:23Z","abstract_excerpt":"We experimentally demonstrate that a Duraluminium thin plate with a thickness profile varying radially in a piecewise constant fashion as h(r)=h(0)(1+(r/Rmax)), with h(0)=0.5 mm, h(Rmax)=2 mm and Rmax=10 cm behaves in many ways as Maxwell's fish-eye lens in optics, since its imaging properties for a Gaussian pulse with central frequencies 30~kHz and 60~kHz are very similar to those predicted by ray trajectories (great circles) on a virtual sphere (rays emanating from the North pole meet at the South pole). However, refocusing time depends on the carrier frequency as a direct consequence of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.5810","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":"2026-05-18T01:41:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2nHdZ8Rz1lWm0GFrEwJt01tT/qCBCVASkgn2hI/isGKnUPbaL0aJ5s/+ec0Dg46ZCNbzRca+8UjqPNjn4VhGAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:46:03.098503Z"},"content_sha256":"d658efd80c4e6091ba81160ee19af1792a039dad6fb8edfa0250e4b8616dddbc","schema_version":"1.0","event_id":"sha256:d658efd80c4e6091ba81160ee19af1792a039dad6fb8edfa0250e4b8616dddbc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/bundle.json","state_url":"https://pith.science/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/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":"2026-05-26T14:46:03Z","links":{"resolver":"https://pith.science/pith/W4SCXBDVO2GTHCDV75YYPXS3UG","bundle":"https://pith.science/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/bundle.json","state":"https://pith.science/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W4SCXBDVO2GTHCDV75YYPXS3UG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:W4SCXBDVO2GTHCDV75YYPXS3UG","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":"709421a0df623096b5fb1e50d89e9d583f6501f8108d943e261cca930718396e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2014-11-21T09:52:23Z","title_canon_sha256":"d3079e68d8ac085613368d9364ab40dda85ac3beffa54a6d6c977c8e6c26e82f"},"schema_version":"1.0","source":{"id":"1411.5810","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.5810","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"arxiv_version","alias_value":"1411.5810v1","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.5810","created_at":"2026-05-18T01:41:28Z"},{"alias_kind":"pith_short_12","alias_value":"W4SCXBDVO2GT","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"W4SCXBDVO2GTHCDV","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"W4SCXBDV","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:d658efd80c4e6091ba81160ee19af1792a039dad6fb8edfa0250e4b8616dddbc","target":"graph","created_at":"2026-05-18T01:41:28Z","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 experimentally demonstrate that a Duraluminium thin plate with a thickness profile varying radially in a piecewise constant fashion as h(r)=h(0)(1+(r/Rmax)), with h(0)=0.5 mm, h(Rmax)=2 mm and Rmax=10 cm behaves in many ways as Maxwell's fish-eye lens in optics, since its imaging properties for a Gaussian pulse with central frequencies 30~kHz and 60~kHz are very similar to those predicted by ray trajectories (great circles) on a virtual sphere (rays emanating from the North pole meet at the South pole). However, refocusing time depends on the carrier frequency as a direct consequence of the","authors_text":"Gautier Lefebvre, Marc Dubois, Patrick Sebbah, Romain Beauvais, Ros Kiri Ing, Younes Achaoui","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2014-11-21T09:52:23Z","title":"Experiments on Maxwell's Fish-eye dynamics in elastic plates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.5810","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":"sha256:13c88be9744747695e784d697002f96e6a003bc7174794407261f1991e52c537","target":"record","created_at":"2026-05-18T01:41:28Z","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":"709421a0df623096b5fb1e50d89e9d583f6501f8108d943e261cca930718396e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2014-11-21T09:52:23Z","title_canon_sha256":"d3079e68d8ac085613368d9364ab40dda85ac3beffa54a6d6c977c8e6c26e82f"},"schema_version":"1.0","source":{"id":"1411.5810","kind":"arxiv","version":1}},"canonical_sha256":"b7242b8475768d338875ff7187de5ba18be792eba989d4406940f22dc6549cc7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7242b8475768d338875ff7187de5ba18be792eba989d4406940f22dc6549cc7","first_computed_at":"2026-05-18T01:41:28.599830Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:28.599830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4BPbfrMAwnTZkBLZliU7Exn6d9eR/B+Cb3t5wnnH+/ps8InnLKqxqYoVodxynHIZHBWYX1q9gIKyA089PxXHBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:28.600522Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.5810","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13c88be9744747695e784d697002f96e6a003bc7174794407261f1991e52c537","sha256:d658efd80c4e6091ba81160ee19af1792a039dad6fb8edfa0250e4b8616dddbc"],"state_sha256":"4b9feb89811649bf854ed7e764507ff9a652295675734742784555e918c2bb81"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7KfQMoUHvrw5TPVUVS0nhv7Ci3u50OS7u2eTwKof873i8m5LWddWL1eHC9ZDoEvYQxPT9zrNHC7T/iRQot39AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T14:46:03.102271Z","bundle_sha256":"97b671c3a7b721d12101c47efa251c945758eaac48bc26e9ed63bcf37813eba7"}}