{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QBTYX6VXDXXXIQLBDNMJR7RFRK","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":"d53886fd3e467173cb4733bb97304fbb25793d9346e10dc08c78374a6acc06da","cross_cats_sorted":["physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-05-31T14:42:31Z","title_canon_sha256":"62f89698a95b6c73e89a7d79353f558496071c5c6bccc300a0e1c3e3a81b5462"},"schema_version":"1.0","source":{"id":"1206.0003","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0003","created_at":"2026-05-18T03:14:39Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0003v3","created_at":"2026-05-18T03:14:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0003","created_at":"2026-05-18T03:14:39Z"},{"alias_kind":"pith_short_12","alias_value":"QBTYX6VXDXXX","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QBTYX6VXDXXXIQLB","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QBTYX6VX","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:d0c29167a486395613c835e51e4307727877472fe51ed2f5c64d90ba0266b0d1","target":"graph","created_at":"2026-05-18T03:14:39Z","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":"Most of us will have at some time thrown a pebble into water, and watched the ripples spread outwards and fade away. But now there is a way to reverse the process, and make those ripples turn around and reconverge again, ... and again, and again. To do this we have designed the Maxwell's Fishpond, a water wave or \"Transformation Aquatics\" version of the Maxwell's Fisheye lens [Tyc et al. 2011, Luneberg 1964] that is now well-known from transformation optics. These are transformation devices where wave propagation on the surface of a sphere is not modelled on an actual sphere, but in a flat dev","authors_text":"Claire Trant, Jiajun Tan, Navin Kandapper, Paul Kinsler, Timothy C. Y. Thio","cross_cats":["physics.pop-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-05-31T14:42:31Z","title":"Maxwell's Fishpond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0003","kind":"arxiv","version":3},"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":"sha256:08e5cc32c7728a2dfcb990160675621970d700272682f90f2420bfab154b70da","target":"record","created_at":"2026-05-18T03:14:39Z","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":"d53886fd3e467173cb4733bb97304fbb25793d9346e10dc08c78374a6acc06da","cross_cats_sorted":["physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-05-31T14:42:31Z","title_canon_sha256":"62f89698a95b6c73e89a7d79353f558496071c5c6bccc300a0e1c3e3a81b5462"},"schema_version":"1.0","source":{"id":"1206.0003","kind":"arxiv","version":3}},"canonical_sha256":"80678bfab71def7441611b5898fe258a91a79d827ce907b3dad60b06d2de5a8b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"80678bfab71def7441611b5898fe258a91a79d827ce907b3dad60b06d2de5a8b","first_computed_at":"2026-05-18T03:14:39.392265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:14:39.392265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"31CZQbBTrUOqiLv7o+Huaqjb0MXCg64kuR7YQ3Y10MO7XFv+HB7TvfxpdAiLxqqReoEYusJETeoJWy7/PHw0Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:14:39.392683Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.0003","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08e5cc32c7728a2dfcb990160675621970d700272682f90f2420bfab154b70da","sha256:d0c29167a486395613c835e51e4307727877472fe51ed2f5c64d90ba0266b0d1"],"state_sha256":"55813d1016d671c95e2d53c352fa2053b172112d0f5cce5a80f4089388e84d34"}