{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:7PWKFQ3UF44HK6F4GJHGFX2SZI","short_pith_number":"pith:7PWKFQ3U","canonical_record":{"source":{"id":"1502.01366","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-02-04T21:47:47Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"f5ae7c6013575a53daf7fb1f7d87d6ee7b97daa3dbbe63935e2765cc0037c49e","abstract_canon_sha256":"75954290986c3ac716922a76ea787823358d4b2a5b66ba36452277d3b0ce67bd"},"schema_version":"1.0"},"canonical_sha256":"fbeca2c3742f387578bc324e62df52ca2864c5bd5137a9c788d6b9f304ff46e3","source":{"kind":"arxiv","id":"1502.01366","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01366","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01366v2","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01366","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_12","alias_value":"7PWKFQ3UF44H","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_16","alias_value":"7PWKFQ3UF44HK6F4","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_8","alias_value":"7PWKFQ3U","created_at":"2026-07-05T00:38:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:7PWKFQ3UF44HK6F4GJHGFX2SZI","target":"record","payload":{"canonical_record":{"source":{"id":"1502.01366","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-02-04T21:47:47Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"f5ae7c6013575a53daf7fb1f7d87d6ee7b97daa3dbbe63935e2765cc0037c49e","abstract_canon_sha256":"75954290986c3ac716922a76ea787823358d4b2a5b66ba36452277d3b0ce67bd"},"schema_version":"1.0"},"canonical_sha256":"fbeca2c3742f387578bc324e62df52ca2864c5bd5137a9c788d6b9f304ff46e3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:38:30.782978Z","signature_b64":"EaN3IfFn6SKSWFlRMgypHfDM9s7nX0TAzKdFF5AOJS+/B2Sx5+wW2mBseDVrjJLFjEmkLH47Vd8HSYcHEXvlDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbeca2c3742f387578bc324e62df52ca2864c5bd5137a9c788d6b9f304ff46e3","last_reissued_at":"2026-07-05T00:38:30.782575Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:38:30.782575Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.01366","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":"2026-07-05T00:38:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L6fhRnAfHDhna++9Ruw3LByvrDyeNikXXGGLV1R3I/etS+cin7GUKgiMP6Xhhtu0tBa0hDm0R+x1I4KxxzulBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:29:56.771430Z"},"content_sha256":"cf07d0e91bd06bb77252fc72107eb1517f6c6529f1512c62a43908f83ffc4bff","schema_version":"1.0","event_id":"sha256:cf07d0e91bd06bb77252fc72107eb1517f6c6529f1512c62a43908f83ffc4bff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:7PWKFQ3UF44HK6F4GJHGFX2SZI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaussian Approximation Potentials: a brief tutorial introduction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Albert P. Bart\\'ok, G\\'abor Cs\\'anyi","submitted_at":"2015-02-04T21:47:47Z","abstract_excerpt":"We present a swift walk-through of our recent work that uses machine learning to fit interatomic potentials based on quantum mechanical data. We describe our Gaussian Approximation Potentials (GAP) framework, discussing a variety of descriptors, how to train the model on total energies and derivatives and the simultaneous use of multiple models. We also show a small example using QUIP, the software sandbox implementation of GAP that is available for non-commercial use."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01366","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1502.01366/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:38:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GIdSJTzBxn/bYrCDvZ3zwsktl482vGS2QjJU+gKnkUja4Ue9OpQJW6vEpfKn7tqVEMz5tzz0YmSAU084ib6wAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:29:56.771811Z"},"content_sha256":"4f51b2b26da81bdb7acd143ab18d7a22b16b067ab46d54ec887a839b1c955bf7","schema_version":"1.0","event_id":"sha256:4f51b2b26da81bdb7acd143ab18d7a22b16b067ab46d54ec887a839b1c955bf7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/bundle.json","state_url":"https://pith.science/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/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":"2026-07-05T09:29:56Z","links":{"resolver":"https://pith.science/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI","bundle":"https://pith.science/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/bundle.json","state":"https://pith.science/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7PWKFQ3UF44HK6F4GJHGFX2SZI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7PWKFQ3UF44HK6F4GJHGFX2SZI","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":"75954290986c3ac716922a76ea787823358d4b2a5b66ba36452277d3b0ce67bd","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-02-04T21:47:47Z","title_canon_sha256":"f5ae7c6013575a53daf7fb1f7d87d6ee7b97daa3dbbe63935e2765cc0037c49e"},"schema_version":"1.0","source":{"id":"1502.01366","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01366","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01366v2","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01366","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_12","alias_value":"7PWKFQ3UF44H","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_16","alias_value":"7PWKFQ3UF44HK6F4","created_at":"2026-07-05T00:38:30Z"},{"alias_kind":"pith_short_8","alias_value":"7PWKFQ3U","created_at":"2026-07-05T00:38:30Z"}],"graph_snapshots":[{"event_id":"sha256:4f51b2b26da81bdb7acd143ab18d7a22b16b067ab46d54ec887a839b1c955bf7","target":"graph","created_at":"2026-07-05T00:38:30Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1502.01366/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a swift walk-through of our recent work that uses machine learning to fit interatomic potentials based on quantum mechanical data. We describe our Gaussian Approximation Potentials (GAP) framework, discussing a variety of descriptors, how to train the model on total energies and derivatives and the simultaneous use of multiple models. We also show a small example using QUIP, the software sandbox implementation of GAP that is available for non-commercial use.","authors_text":"Albert P. Bart\\'ok, G\\'abor Cs\\'anyi","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-02-04T21:47:47Z","title":"Gaussian Approximation Potentials: a brief tutorial introduction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01366","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:cf07d0e91bd06bb77252fc72107eb1517f6c6529f1512c62a43908f83ffc4bff","target":"record","created_at":"2026-07-05T00:38:30Z","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":"75954290986c3ac716922a76ea787823358d4b2a5b66ba36452277d3b0ce67bd","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-02-04T21:47:47Z","title_canon_sha256":"f5ae7c6013575a53daf7fb1f7d87d6ee7b97daa3dbbe63935e2765cc0037c49e"},"schema_version":"1.0","source":{"id":"1502.01366","kind":"arxiv","version":2}},"canonical_sha256":"fbeca2c3742f387578bc324e62df52ca2864c5bd5137a9c788d6b9f304ff46e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbeca2c3742f387578bc324e62df52ca2864c5bd5137a9c788d6b9f304ff46e3","first_computed_at":"2026-07-05T00:38:30.782575Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:38:30.782575Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EaN3IfFn6SKSWFlRMgypHfDM9s7nX0TAzKdFF5AOJS+/B2Sx5+wW2mBseDVrjJLFjEmkLH47Vd8HSYcHEXvlDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:38:30.782978Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.01366","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf07d0e91bd06bb77252fc72107eb1517f6c6529f1512c62a43908f83ffc4bff","sha256:4f51b2b26da81bdb7acd143ab18d7a22b16b067ab46d54ec887a839b1c955bf7"],"state_sha256":"4030c2dab86c656d70f80482df6d2d32de9e7980694ca00bc4254cbdec5831a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YjhnthXgqhYXgg6aEcEQaIxMzSaJbEhj+Hbbn2LIJDsXO+4nmUkaM4yQI2fIe4f3p6Ng+d2tGUKBmS4gz0M5Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T09:29:56.773791Z","bundle_sha256":"ba464823a8d15af1ad57bf307de04b8e75931efc124303b4951775e5e5d3b744"}}