{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ZMSMY6XHJSSKAZZHVT2UH3FJI3","short_pith_number":"pith:ZMSMY6XH","canonical_record":{"source":{"id":"2006.07838","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-06-14T08:21:10Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"74005de4259563a0b4c51390356684c7fd0871d5fe881dcc2bf7a1a81b2da6e0","abstract_canon_sha256":"3e8960c8f8213617420e852a5063d1f825a92d114e4b16c9e6667a74871e59fa"},"schema_version":"1.0"},"canonical_sha256":"cb24cc7ae74ca4a06727acf543eca946e4089e421df708aeceda1974bc5a6b0f","source":{"kind":"arxiv","id":"2006.07838","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.07838","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"arxiv_version","alias_value":"2006.07838v2","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.07838","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_12","alias_value":"ZMSMY6XHJSSK","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_16","alias_value":"ZMSMY6XHJSSKAZZH","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_8","alias_value":"ZMSMY6XH","created_at":"2026-07-05T01:10:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ZMSMY6XHJSSKAZZHVT2UH3FJI3","target":"record","payload":{"canonical_record":{"source":{"id":"2006.07838","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-06-14T08:21:10Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"74005de4259563a0b4c51390356684c7fd0871d5fe881dcc2bf7a1a81b2da6e0","abstract_canon_sha256":"3e8960c8f8213617420e852a5063d1f825a92d114e4b16c9e6667a74871e59fa"},"schema_version":"1.0"},"canonical_sha256":"cb24cc7ae74ca4a06727acf543eca946e4089e421df708aeceda1974bc5a6b0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:10:41.158848Z","signature_b64":"kuKqqRHquyKUEiprAdXvq700wUJ2vZ6SOYh/n1Vt3ukmFDCd/UX26upSEqzxcaUQ4PbVShw3EiZGKOp78yC3BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb24cc7ae74ca4a06727acf543eca946e4089e421df708aeceda1974bc5a6b0f","last_reissued_at":"2026-07-05T01:10:41.158452Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:10:41.158452Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.07838","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:10:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VhYteOInve2bVJIc/+ez4ovxK0TON8i+iK1i+uSSLcVXkf96WnjPCqH7UpGWbnSlphsotxZH2jYtVc7R/zLOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:23:50.630418Z"},"content_sha256":"7915ef49db3c27b15ca2616a255fb90844dd30a7ec51ee90a48dfd0c1018cf82","schema_version":"1.0","event_id":"sha256:7915ef49db3c27b15ca2616a255fb90844dd30a7ec51ee90a48dfd0c1018cf82"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ZMSMY6XHJSSKAZZHVT2UH3FJI3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamic Metasurface Antennas for 6G Extreme Massive MIMO Communications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"eess.SP","authors_text":"David R. Smith, George C. Alexandropoulos, Mohammadreza F. Imani, Nir Shlezinger, Yonina C. Eldar","submitted_at":"2020-06-14T08:21:10Z","abstract_excerpt":"Next generation wireless base stations and access points will transmit and receive using extremely massive numbers of antennas. A promising technology for realizing such massive arrays in a dynamically controllable and scalable manner with reduced cost and power consumption utilizes surfaces of radiating metamaterial elements, known as metasurfaces. To date, metasurfaces are mainly considered in the context of wireless communications as passive reflecting devices, aiding conventional transceivers in shaping the propagation environment. This article presents an alternative application of metasu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.07838","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.07838/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:10:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ilXDqYOgV9pYIf4u057ooXwnQnn60Uek4fuTZtTz/DkOicMW4Q3MoPHV2EBNOcbbtG+LtEDSfZD3aWxPdJO+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:23:50.630891Z"},"content_sha256":"0cfa6bdfd8d254cf9d532c4260cf48cdfffb700dbfc51b108646b1f0740668af","schema_version":"1.0","event_id":"sha256:0cfa6bdfd8d254cf9d532c4260cf48cdfffb700dbfc51b108646b1f0740668af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/bundle.json","state_url":"https://pith.science/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/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":"2026-08-07T09:23:50Z","links":{"resolver":"https://pith.science/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3","bundle":"https://pith.science/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/bundle.json","state":"https://pith.science/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZMSMY6XHJSSKAZZHVT2UH3FJI3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ZMSMY6XHJSSKAZZHVT2UH3FJI3","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":"3e8960c8f8213617420e852a5063d1f825a92d114e4b16c9e6667a74871e59fa","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-06-14T08:21:10Z","title_canon_sha256":"74005de4259563a0b4c51390356684c7fd0871d5fe881dcc2bf7a1a81b2da6e0"},"schema_version":"1.0","source":{"id":"2006.07838","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.07838","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"arxiv_version","alias_value":"2006.07838v2","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.07838","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_12","alias_value":"ZMSMY6XHJSSK","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_16","alias_value":"ZMSMY6XHJSSKAZZH","created_at":"2026-07-05T01:10:41Z"},{"alias_kind":"pith_short_8","alias_value":"ZMSMY6XH","created_at":"2026-07-05T01:10:41Z"}],"graph_snapshots":[{"event_id":"sha256:0cfa6bdfd8d254cf9d532c4260cf48cdfffb700dbfc51b108646b1f0740668af","target":"graph","created_at":"2026-07-05T01:10:41Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2006.07838/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Next generation wireless base stations and access points will transmit and receive using extremely massive numbers of antennas. A promising technology for realizing such massive arrays in a dynamically controllable and scalable manner with reduced cost and power consumption utilizes surfaces of radiating metamaterial elements, known as metasurfaces. To date, metasurfaces are mainly considered in the context of wireless communications as passive reflecting devices, aiding conventional transceivers in shaping the propagation environment. This article presents an alternative application of metasu","authors_text":"David R. Smith, George C. Alexandropoulos, Mohammadreza F. Imani, Nir Shlezinger, Yonina C. Eldar","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-06-14T08:21:10Z","title":"Dynamic Metasurface Antennas for 6G Extreme Massive MIMO Communications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.07838","kind":"arxiv","version":2},"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":"sha256:7915ef49db3c27b15ca2616a255fb90844dd30a7ec51ee90a48dfd0c1018cf82","target":"record","created_at":"2026-07-05T01:10:41Z","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":"3e8960c8f8213617420e852a5063d1f825a92d114e4b16c9e6667a74871e59fa","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-06-14T08:21:10Z","title_canon_sha256":"74005de4259563a0b4c51390356684c7fd0871d5fe881dcc2bf7a1a81b2da6e0"},"schema_version":"1.0","source":{"id":"2006.07838","kind":"arxiv","version":2}},"canonical_sha256":"cb24cc7ae74ca4a06727acf543eca946e4089e421df708aeceda1974bc5a6b0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb24cc7ae74ca4a06727acf543eca946e4089e421df708aeceda1974bc5a6b0f","first_computed_at":"2026-07-05T01:10:41.158452Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:10:41.158452Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kuKqqRHquyKUEiprAdXvq700wUJ2vZ6SOYh/n1Vt3ukmFDCd/UX26upSEqzxcaUQ4PbVShw3EiZGKOp78yC3BA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:10:41.158848Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.07838","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7915ef49db3c27b15ca2616a255fb90844dd30a7ec51ee90a48dfd0c1018cf82","sha256:0cfa6bdfd8d254cf9d532c4260cf48cdfffb700dbfc51b108646b1f0740668af"],"state_sha256":"ad97267f762411d2ebb3a9a2d64bb96ea71b2b5e4c4b1578d0065ab73bc7c40f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C7Oo4gcNYpvvBNqSci8/LaLwQ3kVT6duwHex7OuzLOa3SkKXDk8OeipWgQZMZbHOSQA/1fi2i3xCrUzAMOjKDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T09:23:50.635199Z","bundle_sha256":"4dd56cb8c792bf67dba817a74f5b82e94b209cbbc5e8530cb73d91d8b4414a55"}}