{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:NA3D2Q7IMHQ7HMZRVAZVT7BIDP","short_pith_number":"pith:NA3D2Q7I","canonical_record":{"source":{"id":"1107.0793","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2011-07-05T06:15:48Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"ca0c01d6d735a8731b38f63dd897de4bd80d7d09538f2bc4866c942d45907e50","abstract_canon_sha256":"9941cf252ba9c9b287e19ae5d1cd1da8bbdbbd4ae1b9a6adfe6ff468750bb47b"},"schema_version":"1.0"},"canonical_sha256":"68363d43e861e1f3b331a83359fc281bd1174a72dd49277754805432a587c531","source":{"kind":"arxiv","id":"1107.0793","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.0793","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"arxiv_version","alias_value":"1107.0793v1","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.0793","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"pith_short_12","alias_value":"NA3D2Q7IMHQ7","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NA3D2Q7IMHQ7HMZR","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NA3D2Q7I","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:NA3D2Q7IMHQ7HMZRVAZVT7BIDP","target":"record","payload":{"canonical_record":{"source":{"id":"1107.0793","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2011-07-05T06:15:48Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"ca0c01d6d735a8731b38f63dd897de4bd80d7d09538f2bc4866c942d45907e50","abstract_canon_sha256":"9941cf252ba9c9b287e19ae5d1cd1da8bbdbbd4ae1b9a6adfe6ff468750bb47b"},"schema_version":"1.0"},"canonical_sha256":"68363d43e861e1f3b331a83359fc281bd1174a72dd49277754805432a587c531","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:13:06.860632Z","signature_b64":"Hh1Ug4CTMUBCL6ChRjdu/e5585SAtSILJIf3zHrUrUQ5YPCBoiLOuQ0CVMMkGn62s7ZpMl5LYo+Mh3oSlrf4BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68363d43e861e1f3b331a83359fc281bd1174a72dd49277754805432a587c531","last_reissued_at":"2026-05-18T04:13:06.860121Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:13:06.860121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.0793","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":"2026-05-18T04:13:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2lrLT+zqnm78Wk3Kj0BYAFjGhvu6R+2g/DC6+iD9s+rDNiXrSQP9amVNHFI25XA6CYrjEjIoGwq3+IiFOV5uDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:03:11.028204Z"},"content_sha256":"a7ac210832d68d62d26ede996f539d8924cec2706880e30826f19e091a9841b8","schema_version":"1.0","event_id":"sha256:a7ac210832d68d62d26ede996f539d8924cec2706880e30826f19e091a9841b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:NA3D2Q7IMHQ7HMZRVAZVT7BIDP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Theoretical Study of Hydrogenated Tetrahedral Aluminum Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"physics.atm-clus","authors_text":"Akitomo Tachibana, Ayumu Wagatsuma, Kazuhide Ichikawa, Kouhei Watanabe, Pawel Szarek, Yuji Ikeda","submitted_at":"2011-07-05T06:15:48Z","abstract_excerpt":"We report on the structures of aluminum hydrides derived from a tetrahedral aluminum Al4 cluster using ab initio quantum chemical calculation. Our calculation of binding energies of the aluminum hydrides reveals that stability of these hydrides increases as more hydrogen atoms are adsorbed, while stability of Al-H bonds decreases. We also analyze and discuss the chemical bonds of those clusters by using recently developed method based on the electronic stress tensor."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.0793","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":"2026-05-18T04:13:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SBAbSYYyHHSbCy5fhbuAFONMZhyp+a1UK2hrMDhmiktMzHx2v3t79k9qK+v8OWLEn21gv4VxTYYCwWicm/ZJBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:03:11.028571Z"},"content_sha256":"c24191f2f0e6a9de9b81c17b4dde85d50b39de33df4f30c08ce552027a34113e","schema_version":"1.0","event_id":"sha256:c24191f2f0e6a9de9b81c17b4dde85d50b39de33df4f30c08ce552027a34113e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/bundle.json","state_url":"https://pith.science/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/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":"2026-06-01T20:03:11Z","links":{"resolver":"https://pith.science/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP","bundle":"https://pith.science/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/bundle.json","state":"https://pith.science/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NA3D2Q7IMHQ7HMZRVAZVT7BIDP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:NA3D2Q7IMHQ7HMZRVAZVT7BIDP","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":"9941cf252ba9c9b287e19ae5d1cd1da8bbdbbd4ae1b9a6adfe6ff468750bb47b","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2011-07-05T06:15:48Z","title_canon_sha256":"ca0c01d6d735a8731b38f63dd897de4bd80d7d09538f2bc4866c942d45907e50"},"schema_version":"1.0","source":{"id":"1107.0793","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.0793","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"arxiv_version","alias_value":"1107.0793v1","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.0793","created_at":"2026-05-18T04:13:06Z"},{"alias_kind":"pith_short_12","alias_value":"NA3D2Q7IMHQ7","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NA3D2Q7IMHQ7HMZR","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NA3D2Q7I","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:c24191f2f0e6a9de9b81c17b4dde85d50b39de33df4f30c08ce552027a34113e","target":"graph","created_at":"2026-05-18T04:13:06Z","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 report on the structures of aluminum hydrides derived from a tetrahedral aluminum Al4 cluster using ab initio quantum chemical calculation. Our calculation of binding energies of the aluminum hydrides reveals that stability of these hydrides increases as more hydrogen atoms are adsorbed, while stability of Al-H bonds decreases. We also analyze and discuss the chemical bonds of those clusters by using recently developed method based on the electronic stress tensor.","authors_text":"Akitomo Tachibana, Ayumu Wagatsuma, Kazuhide Ichikawa, Kouhei Watanabe, Pawel Szarek, Yuji Ikeda","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2011-07-05T06:15:48Z","title":"Theoretical Study of Hydrogenated Tetrahedral Aluminum Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.0793","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:a7ac210832d68d62d26ede996f539d8924cec2706880e30826f19e091a9841b8","target":"record","created_at":"2026-05-18T04:13:06Z","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":"9941cf252ba9c9b287e19ae5d1cd1da8bbdbbd4ae1b9a6adfe6ff468750bb47b","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2011-07-05T06:15:48Z","title_canon_sha256":"ca0c01d6d735a8731b38f63dd897de4bd80d7d09538f2bc4866c942d45907e50"},"schema_version":"1.0","source":{"id":"1107.0793","kind":"arxiv","version":1}},"canonical_sha256":"68363d43e861e1f3b331a83359fc281bd1174a72dd49277754805432a587c531","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"68363d43e861e1f3b331a83359fc281bd1174a72dd49277754805432a587c531","first_computed_at":"2026-05-18T04:13:06.860121Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:06.860121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hh1Ug4CTMUBCL6ChRjdu/e5585SAtSILJIf3zHrUrUQ5YPCBoiLOuQ0CVMMkGn62s7ZpMl5LYo+Mh3oSlrf4BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:06.860632Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.0793","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a7ac210832d68d62d26ede996f539d8924cec2706880e30826f19e091a9841b8","sha256:c24191f2f0e6a9de9b81c17b4dde85d50b39de33df4f30c08ce552027a34113e"],"state_sha256":"029b33e1d50ed9e5c97152ffca822df3ee425652b8fb14c10dd3cfa6f302dbaf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r8CXTXDXNL/4ICJ3ZyPDTe+kUOb+dzk8CkEgborzWUZk0iz+E+rK1GovFfBlG7EsBmOqvOhAfTiDbLWXXq7sBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T20:03:11.030525Z","bundle_sha256":"ed8385d6e51a8f90d6ba963eea24e27562b2a6c2c86b459f258d070f87791ec7"}}