{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:FLUYM6WQF5OXCDI2PKRE5P35XZ","short_pith_number":"pith:FLUYM6WQ","canonical_record":{"source":{"id":"2503.03117","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-03-05T02:28:48Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"b79ad10a01b1b85cc59f7e5759089a8357314a5ff1a7b8006b33ae15c9487f9a","abstract_canon_sha256":"afa6d448ce9cf03f965b74644cb6b3ae59064e1fd6fb12dd9d49e1792356eb8a"},"schema_version":"1.0"},"canonical_sha256":"2ae9867ad02f5d710d1a7aa24ebf7dbe6886cb0059be60c1a50cbd235121de67","source":{"kind":"arxiv","id":"2503.03117","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.03117","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"arxiv_version","alias_value":"2503.03117v1","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.03117","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_12","alias_value":"FLUYM6WQF5OX","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_16","alias_value":"FLUYM6WQF5OXCDI2","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_8","alias_value":"FLUYM6WQ","created_at":"2026-07-05T10:24:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:FLUYM6WQF5OXCDI2PKRE5P35XZ","target":"record","payload":{"canonical_record":{"source":{"id":"2503.03117","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-03-05T02:28:48Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"b79ad10a01b1b85cc59f7e5759089a8357314a5ff1a7b8006b33ae15c9487f9a","abstract_canon_sha256":"afa6d448ce9cf03f965b74644cb6b3ae59064e1fd6fb12dd9d49e1792356eb8a"},"schema_version":"1.0"},"canonical_sha256":"2ae9867ad02f5d710d1a7aa24ebf7dbe6886cb0059be60c1a50cbd235121de67","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:24:39.231403Z","signature_b64":"2n9JOQc6hypS5hDPdgPWgN6edsIFmupFPIiWt7u+K/Lci/6ELGvsSbrKbe/sXHT0XYl/JBrJkfkaExuz2kgGCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ae9867ad02f5d710d1a7aa24ebf7dbe6886cb0059be60c1a50cbd235121de67","last_reissued_at":"2026-07-05T10:24:39.230781Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:24:39.230781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.03117","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":"2026-07-05T10:24:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"foKq7j2C1W7JTZWAg2r1PNqxfmW0+eGoAc10q9OwKg/4wovV1zTIHhTf7dylVLQf9Lk99oKFv7PdUdj34Ba/DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T05:13:19.811483Z"},"content_sha256":"94a090d4676e0042ee060f41be2b77609230b39570646e3b955b75a3f27355e0","schema_version":"1.0","event_id":"sha256:94a090d4676e0042ee060f41be2b77609230b39570646e3b955b75a3f27355e0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:FLUYM6WQF5OXCDI2PKRE5P35XZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MIMO-PASS: Uplink and Downlink Transmission via MIMO Pinching-Antenna Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Ali Bereyhi, Chongjun Ouyang, H. Vincent Poor, Saba Asaad, Zhiguo Ding","submitted_at":"2025-03-05T02:28:48Z","abstract_excerpt":"Pinching-antenna systems (PASSs) are a recent flexible-antenna technology that is realized by attaching simple components, referred to as pinching elements, to dielectric waveguides. This work explores the potential of deploying PASS for uplink and downlink transmission in multiuser MIMO settings. For downlink PASS-aided communication, we formulate the optimal hybrid beamforming, in which the digital precoding matrix at the access point and the location of pinching elements on the waveguides are jointly optimized to maximize the achievable weighted sum-rate. Invoking fractional programming and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.03117","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2503.03117/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":"2026-07-05T10:24:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5XXI1s/OqgnBZMGFcJSGs9bYdNJfs+uxohx73F9pIgy7rwyDlOI+2/JZJNi2/+3TaBtihXtQLMK9L9xsYbO9Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T05:13:19.811974Z"},"content_sha256":"f089ca177668e84b991d61e114286272b27780e074b60508e0952f6ace6e408a","schema_version":"1.0","event_id":"sha256:f089ca177668e84b991d61e114286272b27780e074b60508e0952f6ace6e408a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/bundle.json","state_url":"https://pith.science/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/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":"2026-08-08T05:13:19Z","links":{"resolver":"https://pith.science/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ","bundle":"https://pith.science/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/bundle.json","state":"https://pith.science/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FLUYM6WQF5OXCDI2PKRE5P35XZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:FLUYM6WQF5OXCDI2PKRE5P35XZ","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":"afa6d448ce9cf03f965b74644cb6b3ae59064e1fd6fb12dd9d49e1792356eb8a","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-03-05T02:28:48Z","title_canon_sha256":"b79ad10a01b1b85cc59f7e5759089a8357314a5ff1a7b8006b33ae15c9487f9a"},"schema_version":"1.0","source":{"id":"2503.03117","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.03117","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"arxiv_version","alias_value":"2503.03117v1","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.03117","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_12","alias_value":"FLUYM6WQF5OX","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_16","alias_value":"FLUYM6WQF5OXCDI2","created_at":"2026-07-05T10:24:39Z"},{"alias_kind":"pith_short_8","alias_value":"FLUYM6WQ","created_at":"2026-07-05T10:24:39Z"}],"graph_snapshots":[{"event_id":"sha256:f089ca177668e84b991d61e114286272b27780e074b60508e0952f6ace6e408a","target":"graph","created_at":"2026-07-05T10:24:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2503.03117/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Pinching-antenna systems (PASSs) are a recent flexible-antenna technology that is realized by attaching simple components, referred to as pinching elements, to dielectric waveguides. This work explores the potential of deploying PASS for uplink and downlink transmission in multiuser MIMO settings. For downlink PASS-aided communication, we formulate the optimal hybrid beamforming, in which the digital precoding matrix at the access point and the location of pinching elements on the waveguides are jointly optimized to maximize the achievable weighted sum-rate. Invoking fractional programming and","authors_text":"Ali Bereyhi, Chongjun Ouyang, H. Vincent Poor, Saba Asaad, Zhiguo Ding","cross_cats":["eess.SP","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-03-05T02:28:48Z","title":"MIMO-PASS: Uplink and Downlink Transmission via MIMO Pinching-Antenna Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.03117","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":"sha256:94a090d4676e0042ee060f41be2b77609230b39570646e3b955b75a3f27355e0","target":"record","created_at":"2026-07-05T10:24:39Z","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":"afa6d448ce9cf03f965b74644cb6b3ae59064e1fd6fb12dd9d49e1792356eb8a","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-03-05T02:28:48Z","title_canon_sha256":"b79ad10a01b1b85cc59f7e5759089a8357314a5ff1a7b8006b33ae15c9487f9a"},"schema_version":"1.0","source":{"id":"2503.03117","kind":"arxiv","version":1}},"canonical_sha256":"2ae9867ad02f5d710d1a7aa24ebf7dbe6886cb0059be60c1a50cbd235121de67","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ae9867ad02f5d710d1a7aa24ebf7dbe6886cb0059be60c1a50cbd235121de67","first_computed_at":"2026-07-05T10:24:39.230781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:24:39.230781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2n9JOQc6hypS5hDPdgPWgN6edsIFmupFPIiWt7u+K/Lci/6ELGvsSbrKbe/sXHT0XYl/JBrJkfkaExuz2kgGCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:24:39.231403Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.03117","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94a090d4676e0042ee060f41be2b77609230b39570646e3b955b75a3f27355e0","sha256:f089ca177668e84b991d61e114286272b27780e074b60508e0952f6ace6e408a"],"state_sha256":"ff0c965181b9c48f628df40672103c7b3db1092288c6327681d02aa28bdfdb64"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sb5TKFr5L0Wamz24MLUyxcjezLI43vz0E441peFLlz2vEit5knjGDCXk/9XOQ6JZV5+/K30irl4uBubNtEiOBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T05:13:19.816233Z","bundle_sha256":"5f91afc0aa9ab546ac1e3ff83ebc0ec057a3706cb679498219af07c09f82673b"}}