{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:4IWGIKO35IQNDG2VN5UDLIYYQO","short_pith_number":"pith:4IWGIKO3","canonical_record":{"source":{"id":"1203.2760","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-03-13T10:53:46Z","cross_cats_sorted":["math.CA","math.IT"],"title_canon_sha256":"97fe7217559365339eb68d33ff6a336b692253225cf9a84b0c97cc3e61615261","abstract_canon_sha256":"26fd11adafc876c1ab98754a0b4b7ebd353bc724c336ccb72e6d39d84f90bb82"},"schema_version":"1.0"},"canonical_sha256":"e22c6429dbea20d19b556f6835a31883a5099915e1cb0d2c6e13d26fa69084ec","source":{"kind":"arxiv","id":"1203.2760","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2760","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2760v2","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2760","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"pith_short_12","alias_value":"4IWGIKO35IQN","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4IWGIKO35IQNDG2V","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4IWGIKO3","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:4IWGIKO35IQNDG2VN5UDLIYYQO","target":"record","payload":{"canonical_record":{"source":{"id":"1203.2760","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-03-13T10:53:46Z","cross_cats_sorted":["math.CA","math.IT"],"title_canon_sha256":"97fe7217559365339eb68d33ff6a336b692253225cf9a84b0c97cc3e61615261","abstract_canon_sha256":"26fd11adafc876c1ab98754a0b4b7ebd353bc724c336ccb72e6d39d84f90bb82"},"schema_version":"1.0"},"canonical_sha256":"e22c6429dbea20d19b556f6835a31883a5099915e1cb0d2c6e13d26fa69084ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:01:36.120407Z","signature_b64":"21Zv80L1Z7uaOLMdVAexVKSKGFSjOr/U5uWYm2VVI/PAo4VBgz+1nU2CiCGSDGKcLKOkgYWQKmgv6+hqOZrODA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e22c6429dbea20d19b556f6835a31883a5099915e1cb0d2c6e13d26fa69084ec","last_reissued_at":"2026-05-18T03:01:36.119507Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:01:36.119507Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.2760","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":"2026-05-18T03:01:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DbTOy13lmU6KTW/DhayWBLx/BycpDO82NcD0C5d7loNd+I/sFGKGsb5JnXkyWr9sGyjiSvp18ry6cPeL/YhICg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:07:28.821481Z"},"content_sha256":"5a42f3f78b427141fb5cd1ef838834da85c619b84f5ec850edc15967503d2351","schema_version":"1.0","event_id":"sha256:5a42f3f78b427141fb5cd1ef838834da85c619b84f5ec850edc15967503d2351"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:4IWGIKO35IQNDG2VN5UDLIYYQO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New approximations for DQPSK transmission bit error rate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.CA","math.IT"],"primary_cat":"cs.IT","authors_text":"\\'Arp\\'ad Baricz, Szil\\'ard Andr\\'as","submitted_at":"2012-03-13T10:53:46Z","abstract_excerpt":"In this correspondence our aim is to use some tight lower and upper bounds for the differential quaternary phase shift keying transmission bit error rate in order to deduce accurate approximations for the bit error rate by improving the known results in the literature. The computation of our new approximate expressions are significantly simpler than that of the exact expression."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2760","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":""},"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":"2026-05-18T03:01:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9CfmP+ff76lg164RIc+nIEPSpmpTuG9hjp/Fhdf0E6k6duGjxvrb/J+URjNZ2d9BbmCMvd3ilmjFyMkB8tl1Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:07:28.821838Z"},"content_sha256":"a7107e4d03a73e6f7e0f40c8e9b91937e7d10cb0ae6f5c6657f5490d451cc253","schema_version":"1.0","event_id":"sha256:a7107e4d03a73e6f7e0f40c8e9b91937e7d10cb0ae6f5c6657f5490d451cc253"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/bundle.json","state_url":"https://pith.science/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/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":"2026-06-25T10:07:28Z","links":{"resolver":"https://pith.science/pith/4IWGIKO35IQNDG2VN5UDLIYYQO","bundle":"https://pith.science/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/bundle.json","state":"https://pith.science/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4IWGIKO35IQNDG2VN5UDLIYYQO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:4IWGIKO35IQNDG2VN5UDLIYYQO","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":"26fd11adafc876c1ab98754a0b4b7ebd353bc724c336ccb72e6d39d84f90bb82","cross_cats_sorted":["math.CA","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-03-13T10:53:46Z","title_canon_sha256":"97fe7217559365339eb68d33ff6a336b692253225cf9a84b0c97cc3e61615261"},"schema_version":"1.0","source":{"id":"1203.2760","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2760","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2760v2","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2760","created_at":"2026-05-18T03:01:36Z"},{"alias_kind":"pith_short_12","alias_value":"4IWGIKO35IQN","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4IWGIKO35IQNDG2V","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4IWGIKO3","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:a7107e4d03a73e6f7e0f40c8e9b91937e7d10cb0ae6f5c6657f5490d451cc253","target":"graph","created_at":"2026-05-18T03:01:36Z","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":"In this correspondence our aim is to use some tight lower and upper bounds for the differential quaternary phase shift keying transmission bit error rate in order to deduce accurate approximations for the bit error rate by improving the known results in the literature. The computation of our new approximate expressions are significantly simpler than that of the exact expression.","authors_text":"\\'Arp\\'ad Baricz, Szil\\'ard Andr\\'as","cross_cats":["math.CA","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-03-13T10:53:46Z","title":"New approximations for DQPSK transmission bit error rate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2760","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":"sha256:5a42f3f78b427141fb5cd1ef838834da85c619b84f5ec850edc15967503d2351","target":"record","created_at":"2026-05-18T03:01:36Z","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":"26fd11adafc876c1ab98754a0b4b7ebd353bc724c336ccb72e6d39d84f90bb82","cross_cats_sorted":["math.CA","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2012-03-13T10:53:46Z","title_canon_sha256":"97fe7217559365339eb68d33ff6a336b692253225cf9a84b0c97cc3e61615261"},"schema_version":"1.0","source":{"id":"1203.2760","kind":"arxiv","version":2}},"canonical_sha256":"e22c6429dbea20d19b556f6835a31883a5099915e1cb0d2c6e13d26fa69084ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e22c6429dbea20d19b556f6835a31883a5099915e1cb0d2c6e13d26fa69084ec","first_computed_at":"2026-05-18T03:01:36.119507Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:01:36.119507Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"21Zv80L1Z7uaOLMdVAexVKSKGFSjOr/U5uWYm2VVI/PAo4VBgz+1nU2CiCGSDGKcLKOkgYWQKmgv6+hqOZrODA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:01:36.120407Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.2760","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a42f3f78b427141fb5cd1ef838834da85c619b84f5ec850edc15967503d2351","sha256:a7107e4d03a73e6f7e0f40c8e9b91937e7d10cb0ae6f5c6657f5490d451cc253"],"state_sha256":"d36ec72671ade0634afb320cc42c924a59f269bbd9ef3a22a2456e4f6038d24b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9DQG8RwGuwVlP4uXPvASXCX3ZcQbxicSLMoBQkUOJ8+8hJsLnh6zuDY3Q/kEt/diorDguRCEakU3aHZVNv+KAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T10:07:28.823805Z","bundle_sha256":"7f122706098fc9912f6f01867f5dc07620f3c63e33cd37a929f2bd02efa66f57"}}