{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SXBDQQ2M56P42MBKZD6FYOP7Z3","short_pith_number":"pith:SXBDQQ2M","canonical_record":{"source":{"id":"1702.08251","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2017-02-27T12:12:46Z","cross_cats_sorted":[],"title_canon_sha256":"18988aa4a6d1c72a1820e1b576e1b0e14e648b42f8d9c8f60bb2eb2c46f0daa9","abstract_canon_sha256":"487ca165c394990d0264a379f6b7d2584137cd30cc7f1f3da52067f0a28502ac"},"schema_version":"1.0"},"canonical_sha256":"95c238434cef9fcd302ac8fc5c39ffcef83cd092b04ecc24b58a9108d62473bf","source":{"kind":"arxiv","id":"1702.08251","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.08251","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"arxiv_version","alias_value":"1702.08251v1","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.08251","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"pith_short_12","alias_value":"SXBDQQ2M56P4","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SXBDQQ2M56P42MBK","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SXBDQQ2M","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SXBDQQ2M56P42MBKZD6FYOP7Z3","target":"record","payload":{"canonical_record":{"source":{"id":"1702.08251","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2017-02-27T12:12:46Z","cross_cats_sorted":[],"title_canon_sha256":"18988aa4a6d1c72a1820e1b576e1b0e14e648b42f8d9c8f60bb2eb2c46f0daa9","abstract_canon_sha256":"487ca165c394990d0264a379f6b7d2584137cd30cc7f1f3da52067f0a28502ac"},"schema_version":"1.0"},"canonical_sha256":"95c238434cef9fcd302ac8fc5c39ffcef83cd092b04ecc24b58a9108d62473bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:55.436151Z","signature_b64":"fiPwRD7OilzKe8ik+W38Omv5U8Np73FmeaaRlQED/Yp12HPPjhV0HnJ5BrBMGXpA/FQpKfTRBA08cpLAh/UgDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95c238434cef9fcd302ac8fc5c39ffcef83cd092b04ecc24b58a9108d62473bf","last_reissued_at":"2026-05-18T00:49:55.435333Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:55.435333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.08251","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":"2026-05-18T00:49:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rkyGP2CQuSDi5i3JkQL/pu3xsgelziCMw5yKk8HXi/DKjP/ckdyqOr20DJFkF+zr0Q+Hebx+ClpgZ2+dO3E2BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:59:28.174402Z"},"content_sha256":"c660eec28a228aa81b6074e85723007aa814be2df4b332c3161f5408a92a09d0","schema_version":"1.0","event_id":"sha256:c660eec28a228aa81b6074e85723007aa814be2df4b332c3161f5408a92a09d0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SXBDQQ2M56P42MBKZD6FYOP7Z3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hessian corrections to Hybrid Monte Carlo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.CO","authors_text":"Thomas House","submitted_at":"2017-02-27T12:12:46Z","abstract_excerpt":"A method for the introduction of second-order derivatives of the log likelihood into HMC algorithms is introduced, which does not require the Hessian to be evaluated at each leapfrog step but only at the start and end of trajectories."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.08251","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":"2026-05-18T00:49:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D3oaX2oPAJCLZW+yt3PIjF8J1xTPl9bzCG+pabD9D+Asu3akI59TSHIz7/nrTzO24dj1I39nLbQbr6we8CxCDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:59:28.175084Z"},"content_sha256":"dabf81be48552bb38a8d991de287cd4b9d60dfaec16424623115848c4bf8f2ac","schema_version":"1.0","event_id":"sha256:dabf81be48552bb38a8d991de287cd4b9d60dfaec16424623115848c4bf8f2ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/bundle.json","state_url":"https://pith.science/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/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":"2026-06-06T19:59:28Z","links":{"resolver":"https://pith.science/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3","bundle":"https://pith.science/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/bundle.json","state":"https://pith.science/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SXBDQQ2M56P42MBKZD6FYOP7Z3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SXBDQQ2M56P42MBKZD6FYOP7Z3","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":"487ca165c394990d0264a379f6b7d2584137cd30cc7f1f3da52067f0a28502ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2017-02-27T12:12:46Z","title_canon_sha256":"18988aa4a6d1c72a1820e1b576e1b0e14e648b42f8d9c8f60bb2eb2c46f0daa9"},"schema_version":"1.0","source":{"id":"1702.08251","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.08251","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"arxiv_version","alias_value":"1702.08251v1","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.08251","created_at":"2026-05-18T00:49:55Z"},{"alias_kind":"pith_short_12","alias_value":"SXBDQQ2M56P4","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SXBDQQ2M56P42MBK","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SXBDQQ2M","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:dabf81be48552bb38a8d991de287cd4b9d60dfaec16424623115848c4bf8f2ac","target":"graph","created_at":"2026-05-18T00:49:55Z","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":"A method for the introduction of second-order derivatives of the log likelihood into HMC algorithms is introduced, which does not require the Hessian to be evaluated at each leapfrog step but only at the start and end of trajectories.","authors_text":"Thomas House","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2017-02-27T12:12:46Z","title":"Hessian corrections to Hybrid Monte Carlo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.08251","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:c660eec28a228aa81b6074e85723007aa814be2df4b332c3161f5408a92a09d0","target":"record","created_at":"2026-05-18T00:49:55Z","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":"487ca165c394990d0264a379f6b7d2584137cd30cc7f1f3da52067f0a28502ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.CO","submitted_at":"2017-02-27T12:12:46Z","title_canon_sha256":"18988aa4a6d1c72a1820e1b576e1b0e14e648b42f8d9c8f60bb2eb2c46f0daa9"},"schema_version":"1.0","source":{"id":"1702.08251","kind":"arxiv","version":1}},"canonical_sha256":"95c238434cef9fcd302ac8fc5c39ffcef83cd092b04ecc24b58a9108d62473bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95c238434cef9fcd302ac8fc5c39ffcef83cd092b04ecc24b58a9108d62473bf","first_computed_at":"2026-05-18T00:49:55.435333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:55.435333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fiPwRD7OilzKe8ik+W38Omv5U8Np73FmeaaRlQED/Yp12HPPjhV0HnJ5BrBMGXpA/FQpKfTRBA08cpLAh/UgDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:55.436151Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.08251","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c660eec28a228aa81b6074e85723007aa814be2df4b332c3161f5408a92a09d0","sha256:dabf81be48552bb38a8d991de287cd4b9d60dfaec16424623115848c4bf8f2ac"],"state_sha256":"994f0daa6a3195008310918d69e4a65784ae67a8fc09b375e30c7f54b24da90b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5VQ3SBy65MGeTdkCoEOTi1rBTYgBKHqQAQgs59WTJSk1ppquDgQyItKTb1uFhFiLYB5Y+bmXY9psZqYNdSXBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:59:28.178936Z","bundle_sha256":"dd71c8c8ba26b8dac2c760f85abd3b600348a9ab93786fbca37636ae662f4810"}}