{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4DFEW74H4LLAQW27LCUVYCEFYR","short_pith_number":"pith:4DFEW74H","canonical_record":{"source":{"id":"1109.1594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T22:23:19Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"72fce60991b496b004b394576fb5a19082020af1eaf4a6501dc7561a4a8b58ad","abstract_canon_sha256":"3b964f66b9ba4c9722cf296cf20d1874e44cdb86efecf6883d93edab84cf43c6"},"schema_version":"1.0"},"canonical_sha256":"e0ca4b7f87e2d6085b5f58a95c0885c45995b78e366f9a31df3f13c982fe7721","source":{"kind":"arxiv","id":"1109.1594","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1594","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1594v1","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1594","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"pith_short_12","alias_value":"4DFEW74H4LLA","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4DFEW74H4LLAQW27","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4DFEW74H","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4DFEW74H4LLAQW27LCUVYCEFYR","target":"record","payload":{"canonical_record":{"source":{"id":"1109.1594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T22:23:19Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"72fce60991b496b004b394576fb5a19082020af1eaf4a6501dc7561a4a8b58ad","abstract_canon_sha256":"3b964f66b9ba4c9722cf296cf20d1874e44cdb86efecf6883d93edab84cf43c6"},"schema_version":"1.0"},"canonical_sha256":"e0ca4b7f87e2d6085b5f58a95c0885c45995b78e366f9a31df3f13c982fe7721","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:05:38.347591Z","signature_b64":"8/MljLRiCvtebjh/ZeQVhXmAEEoeiB9aOqgYMmGX0CyikKq5u54xMzf+wgVJ0+klKZiOo1AvH3l3CTfJ4F4jCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e0ca4b7f87e2d6085b5f58a95c0885c45995b78e366f9a31df3f13c982fe7721","last_reissued_at":"2026-05-18T04:05:38.347227Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:05:38.347227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.1594","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":"2026-05-18T04:05:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P3jBF8RYTerwlhXEEtH6ELjkJ2YW+kFWhQ0Mi1RtYLrnNejEf6UcJKnRg/sdkISkt8KKj3CXh0y9VflSQ+T4AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T22:45:26.039775Z"},"content_sha256":"44e998e16faa9202345a0514ff0f0175d712d1f373cee5fa75f2e98e4471c21c","schema_version":"1.0","event_id":"sha256:44e998e16faa9202345a0514ff0f0175d712d1f373cee5fa75f2e98e4471c21c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4DFEW74H4LLAQW27LCUVYCEFYR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Predicting Two-Dimensional Boron-Carbon Compounds by the Global Optimization Method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hanyu Liu, Hongjun Xiang, Jihui Yang, Su-Huai Wei, Xiaojun Wu, Xingao Gong, Xinyu Luo, Yanchao Wang, Yanming Ma","submitted_at":"2011-09-07T22:23:19Z","abstract_excerpt":"We adopt a global optimization method to predict two-dimensional (2D) nanostructures through the particle-swarm optimization (PSO) algorithm. By performing PSO simulations, we predict new stable structures of 2D boron-carbon (B-C) compounds for a wide range of boron concentrations. Our calculations show that: (1) All 2D B-C compounds are metallic except for BC3 which is a magic case where the isolation of carbon six-membered ring by boron atoms results in a semiconducting behavior. (2) For C-rich B-C compounds, the most stable 2D structures can be viewed as boron doped graphene structures, whe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1594","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":""},"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":"2026-05-18T04:05:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"REXDxTAcbq2W9/ivg8MAYqR3cDTOvYlk9VROZV+RhFDIiEpLbCIGGgBGCqKK3W8aNBdLyJF3pL5MwZsJKVP+BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T22:45:26.040467Z"},"content_sha256":"0b6ea87b5e549441cf3fa8a34119fe08b4585dc9e0b0675fad61e46527b931e3","schema_version":"1.0","event_id":"sha256:0b6ea87b5e549441cf3fa8a34119fe08b4585dc9e0b0675fad61e46527b931e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4DFEW74H4LLAQW27LCUVYCEFYR/bundle.json","state_url":"https://pith.science/pith/4DFEW74H4LLAQW27LCUVYCEFYR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4DFEW74H4LLAQW27LCUVYCEFYR/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":"2026-06-06T22:45:26Z","links":{"resolver":"https://pith.science/pith/4DFEW74H4LLAQW27LCUVYCEFYR","bundle":"https://pith.science/pith/4DFEW74H4LLAQW27LCUVYCEFYR/bundle.json","state":"https://pith.science/pith/4DFEW74H4LLAQW27LCUVYCEFYR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4DFEW74H4LLAQW27LCUVYCEFYR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4DFEW74H4LLAQW27LCUVYCEFYR","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":"3b964f66b9ba4c9722cf296cf20d1874e44cdb86efecf6883d93edab84cf43c6","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T22:23:19Z","title_canon_sha256":"72fce60991b496b004b394576fb5a19082020af1eaf4a6501dc7561a4a8b58ad"},"schema_version":"1.0","source":{"id":"1109.1594","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1594","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1594v1","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1594","created_at":"2026-05-18T04:05:38Z"},{"alias_kind":"pith_short_12","alias_value":"4DFEW74H4LLA","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4DFEW74H4LLAQW27","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4DFEW74H","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:0b6ea87b5e549441cf3fa8a34119fe08b4585dc9e0b0675fad61e46527b931e3","target":"graph","created_at":"2026-05-18T04:05:38Z","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":"We adopt a global optimization method to predict two-dimensional (2D) nanostructures through the particle-swarm optimization (PSO) algorithm. By performing PSO simulations, we predict new stable structures of 2D boron-carbon (B-C) compounds for a wide range of boron concentrations. Our calculations show that: (1) All 2D B-C compounds are metallic except for BC3 which is a magic case where the isolation of carbon six-membered ring by boron atoms results in a semiconducting behavior. (2) For C-rich B-C compounds, the most stable 2D structures can be viewed as boron doped graphene structures, whe","authors_text":"Hanyu Liu, Hongjun Xiang, Jihui Yang, Su-Huai Wei, Xiaojun Wu, Xingao Gong, Xinyu Luo, Yanchao Wang, Yanming Ma","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T22:23:19Z","title":"Predicting Two-Dimensional Boron-Carbon Compounds by the Global Optimization Method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1594","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":"sha256:44e998e16faa9202345a0514ff0f0175d712d1f373cee5fa75f2e98e4471c21c","target":"record","created_at":"2026-05-18T04:05:38Z","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":"3b964f66b9ba4c9722cf296cf20d1874e44cdb86efecf6883d93edab84cf43c6","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-09-07T22:23:19Z","title_canon_sha256":"72fce60991b496b004b394576fb5a19082020af1eaf4a6501dc7561a4a8b58ad"},"schema_version":"1.0","source":{"id":"1109.1594","kind":"arxiv","version":1}},"canonical_sha256":"e0ca4b7f87e2d6085b5f58a95c0885c45995b78e366f9a31df3f13c982fe7721","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0ca4b7f87e2d6085b5f58a95c0885c45995b78e366f9a31df3f13c982fe7721","first_computed_at":"2026-05-18T04:05:38.347227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:05:38.347227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8/MljLRiCvtebjh/ZeQVhXmAEEoeiB9aOqgYMmGX0CyikKq5u54xMzf+wgVJ0+klKZiOo1AvH3l3CTfJ4F4jCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:05:38.347591Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.1594","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44e998e16faa9202345a0514ff0f0175d712d1f373cee5fa75f2e98e4471c21c","sha256:0b6ea87b5e549441cf3fa8a34119fe08b4585dc9e0b0675fad61e46527b931e3"],"state_sha256":"d63b548d439e3cb6ac9bdb2c9f4b7c9d0d5b270d0b77d16f3d948aec588ca0ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4UiofZYXzoEjvjcLzkazm5HrPjMB70Y1482LIwp1Z7G2p0aYIwoJ2eSm86q205IwUgMiAHcCziLAMSiNoXKEBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T22:45:26.044897Z","bundle_sha256":"da1fa7e5bac9b7b194284d831427dc0e4e4c0d9be2295c56350823f4cf033fbb"}}