{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:T5CD3HVWKAT4WKS2UDXU7EVEOE","short_pith_number":"pith:T5CD3HVW","canonical_record":{"source":{"id":"1512.05029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-16T02:15:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"1ce530d20edcd61070899bffa2632b55f099a0f5f09d0d2db5f339296ef63266","abstract_canon_sha256":"70bd3511bdb3fb20c6e4426bbd25b853e3e077a6be5442104e530a6b852dabc2"},"schema_version":"1.0"},"canonical_sha256":"9f443d9eb65027cb2a5aa0ef4f92a4710908ae459baeb712623b00e30df96492","source":{"kind":"arxiv","id":"1512.05029","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05029","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05029v1","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05029","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"pith_short_12","alias_value":"T5CD3HVWKAT4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T5CD3HVWKAT4WKS2","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T5CD3HVW","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:T5CD3HVWKAT4WKS2UDXU7EVEOE","target":"record","payload":{"canonical_record":{"source":{"id":"1512.05029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-16T02:15:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"1ce530d20edcd61070899bffa2632b55f099a0f5f09d0d2db5f339296ef63266","abstract_canon_sha256":"70bd3511bdb3fb20c6e4426bbd25b853e3e077a6be5442104e530a6b852dabc2"},"schema_version":"1.0"},"canonical_sha256":"9f443d9eb65027cb2a5aa0ef4f92a4710908ae459baeb712623b00e30df96492","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:05.742615Z","signature_b64":"6Eg3XYU9Blu0zRYzsKRoSWKyvm20ZwIqvLXf13emXZlsFzC2sF2odsvrd8nO7GGIZHokQIwY9TjYccePesd2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f443d9eb65027cb2a5aa0ef4f92a4710908ae459baeb712623b00e30df96492","last_reissued_at":"2026-05-18T01:12:05.742195Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:05.742195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.05029","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":"2026-05-18T01:12:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a0pdTwhjzvhfB9O8Gt7Tle/BgFh76MQWzxOi0KxdGWIiblRBhMhijrWHfegdXJ58Isjur+gf1G4djSLiHqhLAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:39:59.569016Z"},"content_sha256":"89b7bb22d5c185c0b04ad0080985fd1bca6717c28a394da24b888d27f5d989cb","schema_version":"1.0","event_id":"sha256:89b7bb22d5c185c0b04ad0080985fd1bca6717c28a394da24b888d27f5d989cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:T5CD3HVWKAT4WKS2UDXU7EVEOE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental Realization of Two-Dimensional Boron Sheets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Baojie Feng, Hui Li, Jin Zhang, Kehui Wu, Lan Chen, Peng Cheng, Qing Zhong, Sheng Meng, Shuai Li, Wenbin Li","submitted_at":"2015-12-16T02:15:31Z","abstract_excerpt":"Boron is the fifth element in the periodic table and possesses rich chemistry second only to carbon. A striking feature of boron is that B12 icosahedral cages occur as the building blocks in bulk boron and many boron compounds. This is in contrast to its neighboring element, carbon, which prefers 2D layered structure (graphite) in its bulk form. On the other hand, boron clusters of medium size have been predicted to be planar or quasi-planar, such as B12+ , B13+, B19-, B36, and so on. This is also in contrast to carbon clusters which exhibit various cage structures (fullerenes). Therefore, bor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05029","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":"2026-05-18T01:12:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BElqksQSz/GUgDyVwc8bS0xk5t/PNqeLm8pqvgqpZd//Spim5aV34B7rPveH+1v0Zucy9OIlUeGz3d2HkzcWCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:39:59.569694Z"},"content_sha256":"6d9661e49128448e27fc2370ed02c1f0c0b46e2eacbe30550dca0ece5e183714","schema_version":"1.0","event_id":"sha256:6d9661e49128448e27fc2370ed02c1f0c0b46e2eacbe30550dca0ece5e183714"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/bundle.json","state_url":"https://pith.science/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/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":"2026-05-25T11:39:59Z","links":{"resolver":"https://pith.science/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE","bundle":"https://pith.science/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/bundle.json","state":"https://pith.science/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5CD3HVWKAT4WKS2UDXU7EVEOE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:T5CD3HVWKAT4WKS2UDXU7EVEOE","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":"70bd3511bdb3fb20c6e4426bbd25b853e3e077a6be5442104e530a6b852dabc2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-16T02:15:31Z","title_canon_sha256":"1ce530d20edcd61070899bffa2632b55f099a0f5f09d0d2db5f339296ef63266"},"schema_version":"1.0","source":{"id":"1512.05029","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05029","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05029v1","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05029","created_at":"2026-05-18T01:12:05Z"},{"alias_kind":"pith_short_12","alias_value":"T5CD3HVWKAT4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T5CD3HVWKAT4WKS2","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T5CD3HVW","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:6d9661e49128448e27fc2370ed02c1f0c0b46e2eacbe30550dca0ece5e183714","target":"graph","created_at":"2026-05-18T01:12:05Z","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":"Boron is the fifth element in the periodic table and possesses rich chemistry second only to carbon. A striking feature of boron is that B12 icosahedral cages occur as the building blocks in bulk boron and many boron compounds. This is in contrast to its neighboring element, carbon, which prefers 2D layered structure (graphite) in its bulk form. On the other hand, boron clusters of medium size have been predicted to be planar or quasi-planar, such as B12+ , B13+, B19-, B36, and so on. This is also in contrast to carbon clusters which exhibit various cage structures (fullerenes). Therefore, bor","authors_text":"Baojie Feng, Hui Li, Jin Zhang, Kehui Wu, Lan Chen, Peng Cheng, Qing Zhong, Sheng Meng, Shuai Li, Wenbin Li","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-16T02:15:31Z","title":"Experimental Realization of Two-Dimensional Boron Sheets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05029","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":"sha256:89b7bb22d5c185c0b04ad0080985fd1bca6717c28a394da24b888d27f5d989cb","target":"record","created_at":"2026-05-18T01:12:05Z","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":"70bd3511bdb3fb20c6e4426bbd25b853e3e077a6be5442104e530a6b852dabc2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-16T02:15:31Z","title_canon_sha256":"1ce530d20edcd61070899bffa2632b55f099a0f5f09d0d2db5f339296ef63266"},"schema_version":"1.0","source":{"id":"1512.05029","kind":"arxiv","version":1}},"canonical_sha256":"9f443d9eb65027cb2a5aa0ef4f92a4710908ae459baeb712623b00e30df96492","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f443d9eb65027cb2a5aa0ef4f92a4710908ae459baeb712623b00e30df96492","first_computed_at":"2026-05-18T01:12:05.742195Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:05.742195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6Eg3XYU9Blu0zRYzsKRoSWKyvm20ZwIqvLXf13emXZlsFzC2sF2odsvrd8nO7GGIZHokQIwY9TjYccePesd2CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:05.742615Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.05029","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89b7bb22d5c185c0b04ad0080985fd1bca6717c28a394da24b888d27f5d989cb","sha256:6d9661e49128448e27fc2370ed02c1f0c0b46e2eacbe30550dca0ece5e183714"],"state_sha256":"2d6bdbe95f31cc29eda60f722449984658ac3cb6cc77d69b197788e3ec72da60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VaHGg6VA7UeKrSU+rR7c6EjrEXWBcH2ZRYxd8sspy5/zF9wcxrEvf39LY3qRAvslsf7pC2ro8s3wj27/zmP+Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T11:39:59.573508Z","bundle_sha256":"016f867af6493984e8bf527ac48bf7f7400e20cb45c4d5d33891abf96e15eb54"}}