{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:QBTYX6VXDXXXIQLBDNMJR7RFRK","short_pith_number":"pith:QBTYX6VX","canonical_record":{"source":{"id":"1206.0003","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-05-31T14:42:31Z","cross_cats_sorted":["physics.pop-ph"],"title_canon_sha256":"62f89698a95b6c73e89a7d79353f558496071c5c6bccc300a0e1c3e3a81b5462","abstract_canon_sha256":"d53886fd3e467173cb4733bb97304fbb25793d9346e10dc08c78374a6acc06da"},"schema_version":"1.0"},"canonical_sha256":"80678bfab71def7441611b5898fe258a91a79d827ce907b3dad60b06d2de5a8b","source":{"kind":"arxiv","id":"1206.0003","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:QBTYX6VXDXXXIQLBDNMJR7RFRK","target":"record","payload":{"canonical_record":{"source":{"id":"1206.0003","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-05-31T14:42:31Z","cross_cats_sorted":["physics.pop-ph"],"title_canon_sha256":"62f89698a95b6c73e89a7d79353f558496071c5c6bccc300a0e1c3e3a81b5462","abstract_canon_sha256":"d53886fd3e467173cb4733bb97304fbb25793d9346e10dc08c78374a6acc06da"},"schema_version":"1.0"},"canonical_sha256":"80678bfab71def7441611b5898fe258a91a79d827ce907b3dad60b06d2de5a8b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:14:39.392683Z","signature_b64":"31CZQbBTrUOqiLv7o+Huaqjb0MXCg64kuR7YQ3Y10MO7XFv+HB7TvfxpdAiLxqqReoEYusJETeoJWy7/PHw0Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"80678bfab71def7441611b5898fe258a91a79d827ce907b3dad60b06d2de5a8b","last_reissued_at":"2026-05-18T03:14:39.392265Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:14:39.392265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.0003","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:14:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CGJdLAyvRnWXVbT0So9c5GCdcc83vFWCTcSo0ZKzgDd+zPBJfyDEkkJ3VcsMWui4FUviu/VTGlayI9p97MyVDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:35.370947Z"},"content_sha256":"08e5cc32c7728a2dfcb990160675621970d700272682f90f2420bfab154b70da","schema_version":"1.0","event_id":"sha256:08e5cc32c7728a2dfcb990160675621970d700272682f90f2420bfab154b70da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:QBTYX6VXDXXXIQLBDNMJR7RFRK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Maxwell's Fishpond","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.pop-ph"],"primary_cat":"physics.class-ph","authors_text":"Claire Trant, Jiajun Tan, Navin Kandapper, Paul Kinsler, Timothy C. Y. Thio","submitted_at":"2012-05-31T14:42:31Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0003","kind":"arxiv","version":3},"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":"2026-05-18T03:14:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VYXq+EcxYN0bQv8cxOENXb4l6siCtHOckdoxXVk1eiuxThunPO6NMDwqmqTCPNoFntroysubw/nqLMY9U+8hCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:35.371299Z"},"content_sha256":"d0c29167a486395613c835e51e4307727877472fe51ed2f5c64d90ba0266b0d1","schema_version":"1.0","event_id":"sha256:d0c29167a486395613c835e51e4307727877472fe51ed2f5c64d90ba0266b0d1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/bundle.json","state_url":"https://pith.science/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/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":"2026-06-05T12:11:35Z","links":{"resolver":"https://pith.science/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK","bundle":"https://pith.science/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/bundle.json","state":"https://pith.science/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QBTYX6VXDXXXIQLBDNMJR7RFRK/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0ptv0m8DeO8WyZ41N9lTYLh6AvUVdZZQzds/VQ0q+7GXFJCtlCTKoqXhSalELY3K+fEel65CKobemHO1Gzy8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:11:35.373578Z","bundle_sha256":"fbe063d612d023b659b0cadcf84ce9e322fc125b5134fb9ae74cc2dda0282f9b"}}