{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:KNPWNOWTI3UWR4XQTEOGHBZPDK","short_pith_number":"pith:KNPWNOWT","canonical_record":{"source":{"id":"1603.01990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-07T10:04:26Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"9bede9aface705a457cfeb47b81f079769d4f2903cb797f1f10be9692e84d2a3","abstract_canon_sha256":"c5972df3abf4ef3bbc3f6b041ec670152f93ff9cd2677f4fb716398c2a8007e9"},"schema_version":"1.0"},"canonical_sha256":"535f66bad346e968f2f0991c63872f1aba2ae4985b824e81523aaccd7b27a191","source":{"kind":"arxiv","id":"1603.01990","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.01990","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"arxiv_version","alias_value":"1603.01990v1","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.01990","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"pith_short_12","alias_value":"KNPWNOWTI3UW","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KNPWNOWTI3UWR4XQ","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KNPWNOWT","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:KNPWNOWTI3UWR4XQTEOGHBZPDK","target":"record","payload":{"canonical_record":{"source":{"id":"1603.01990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-07T10:04:26Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"9bede9aface705a457cfeb47b81f079769d4f2903cb797f1f10be9692e84d2a3","abstract_canon_sha256":"c5972df3abf4ef3bbc3f6b041ec670152f93ff9cd2677f4fb716398c2a8007e9"},"schema_version":"1.0"},"canonical_sha256":"535f66bad346e968f2f0991c63872f1aba2ae4985b824e81523aaccd7b27a191","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:49.279161Z","signature_b64":"ryjXQp5DM2d7+D1HRKwvp/CPDRJnCpRJKDY7G6he5v9rsep5Q0uBt4tnln58jD8DeRX7+cGgNHE+QOWdkFdFBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"535f66bad346e968f2f0991c63872f1aba2ae4985b824e81523aaccd7b27a191","last_reissued_at":"2026-05-18T01:15:49.278629Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:49.278629Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.01990","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":"2026-05-18T01:15:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gErSzKBoT+jO31KhfMTTjJilHcI9rYdjH/F4A3N79q5rq1EgGM4krsqGb1NmqKSf9rcBdsCOLPVCdQUwdejFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:24:06.229820Z"},"content_sha256":"ce9c8c528e7f784336e6bd5ea337861a35f33814af410cbb6d7d1a3c1566a0de","schema_version":"1.0","event_id":"sha256:ce9c8c528e7f784336e6bd5ea337861a35f33814af410cbb6d7d1a3c1566a0de"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:KNPWNOWTI3UWR4XQTEOGHBZPDK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Perspective: How good is DFT for water?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Michaelides, D. Alf\\`e, M. J. Gillan","submitted_at":"2016-03-07T10:04:26Z","abstract_excerpt":"Kohn-Sham density functional theory (DFT) has become established as an indispensable tool for investigating aqueous systems of all kinds, including those important in chemistry, surface science, biology and the earth sciences. Nevertheless, many widely used approximations for the exchange-correlation (XC) functional describe the properties of pure water systems with an accuracy that is not fully satisfactory. The explicit inclusion of dispersion interactions generally improves the description, but there remain large disagreements between the predictions of different dispersion-inclusive method"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.01990","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":"2026-05-18T01:15:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ryqQ7SiDNSU0yq9SCa2UGbAM/zxZb5/ewA7RTSXkpvgh82kGZEX2h7M9QN+yjjBJMdSRSPUhM/inTfJPd0lxCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:24:06.230521Z"},"content_sha256":"045684d9055980f78e1f3c66711d03f3696489af56d47b443bd70cdcd43e719e","schema_version":"1.0","event_id":"sha256:045684d9055980f78e1f3c66711d03f3696489af56d47b443bd70cdcd43e719e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/bundle.json","state_url":"https://pith.science/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/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":"2026-05-26T14:24:06Z","links":{"resolver":"https://pith.science/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK","bundle":"https://pith.science/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/bundle.json","state":"https://pith.science/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KNPWNOWTI3UWR4XQTEOGHBZPDK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:KNPWNOWTI3UWR4XQTEOGHBZPDK","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":"c5972df3abf4ef3bbc3f6b041ec670152f93ff9cd2677f4fb716398c2a8007e9","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-07T10:04:26Z","title_canon_sha256":"9bede9aface705a457cfeb47b81f079769d4f2903cb797f1f10be9692e84d2a3"},"schema_version":"1.0","source":{"id":"1603.01990","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.01990","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"arxiv_version","alias_value":"1603.01990v1","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.01990","created_at":"2026-05-18T01:15:49Z"},{"alias_kind":"pith_short_12","alias_value":"KNPWNOWTI3UW","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KNPWNOWTI3UWR4XQ","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KNPWNOWT","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:045684d9055980f78e1f3c66711d03f3696489af56d47b443bd70cdcd43e719e","target":"graph","created_at":"2026-05-18T01:15:49Z","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":"Kohn-Sham density functional theory (DFT) has become established as an indispensable tool for investigating aqueous systems of all kinds, including those important in chemistry, surface science, biology and the earth sciences. Nevertheless, many widely used approximations for the exchange-correlation (XC) functional describe the properties of pure water systems with an accuracy that is not fully satisfactory. The explicit inclusion of dispersion interactions generally improves the description, but there remain large disagreements between the predictions of different dispersion-inclusive method","authors_text":"A. Michaelides, D. Alf\\`e, M. J. Gillan","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-07T10:04:26Z","title":"Perspective: How good is DFT for water?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.01990","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:ce9c8c528e7f784336e6bd5ea337861a35f33814af410cbb6d7d1a3c1566a0de","target":"record","created_at":"2026-05-18T01:15:49Z","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":"c5972df3abf4ef3bbc3f6b041ec670152f93ff9cd2677f4fb716398c2a8007e9","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-07T10:04:26Z","title_canon_sha256":"9bede9aface705a457cfeb47b81f079769d4f2903cb797f1f10be9692e84d2a3"},"schema_version":"1.0","source":{"id":"1603.01990","kind":"arxiv","version":1}},"canonical_sha256":"535f66bad346e968f2f0991c63872f1aba2ae4985b824e81523aaccd7b27a191","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"535f66bad346e968f2f0991c63872f1aba2ae4985b824e81523aaccd7b27a191","first_computed_at":"2026-05-18T01:15:49.278629Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:49.278629Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ryjXQp5DM2d7+D1HRKwvp/CPDRJnCpRJKDY7G6he5v9rsep5Q0uBt4tnln58jD8DeRX7+cGgNHE+QOWdkFdFBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:49.279161Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.01990","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce9c8c528e7f784336e6bd5ea337861a35f33814af410cbb6d7d1a3c1566a0de","sha256:045684d9055980f78e1f3c66711d03f3696489af56d47b443bd70cdcd43e719e"],"state_sha256":"86223ffdfc97662f92adf268f2f94a9b887aabc73554efa34e26dd04e9b09937"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w2tBiBc8BZUSsmyYPnSZlHlw/zx050r/yRtN/2UmBT4LDne7tM/lScgCDAvidowItgpDMVmJSQJShC3Es21ACA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T14:24:06.234096Z","bundle_sha256":"3917081277480685be98faf943eecaa8cc2f7f9af3dffff2cd7d0b71d99e50ef"}}