{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:RI2O6KRPHHKBHPT2V6X27UAMW4","short_pith_number":"pith:RI2O6KRP","canonical_record":{"source":{"id":"1310.5738","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ML","submitted_at":"2013-10-21T22:02:17Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"c5ff8eabd694bebbbb0141dd49f0c35f2d0235cf17c66fb126364d02ca0428f0","abstract_canon_sha256":"969aa733ac418b0b0c228f3f93d5ed025e44f2c054436d3ea54a55ab1de7d0f3"},"schema_version":"1.0"},"canonical_sha256":"8a34ef2a2f39d413be7aafafafd00cb71e9564b7dab2e58e8f6a2aad26396594","source":{"kind":"arxiv","id":"1310.5738","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.5738","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"arxiv_version","alias_value":"1310.5738v1","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.5738","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"pith_short_12","alias_value":"RI2O6KRPHHKB","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"RI2O6KRPHHKBHPT2","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"RI2O6KRP","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:RI2O6KRPHHKBHPT2V6X27UAMW4","target":"record","payload":{"canonical_record":{"source":{"id":"1310.5738","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ML","submitted_at":"2013-10-21T22:02:17Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"c5ff8eabd694bebbbb0141dd49f0c35f2d0235cf17c66fb126364d02ca0428f0","abstract_canon_sha256":"969aa733ac418b0b0c228f3f93d5ed025e44f2c054436d3ea54a55ab1de7d0f3"},"schema_version":"1.0"},"canonical_sha256":"8a34ef2a2f39d413be7aafafafd00cb71e9564b7dab2e58e8f6a2aad26396594","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:09:32.542140Z","signature_b64":"QSHainNBtFEQlCmc5qfDOWLXA40EfUtOG7Q2vQpU/Z20t1RmO5JmS+MPboaoeh8ApE/jp0fiemWDraSd+O0bDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a34ef2a2f39d413be7aafafafd00cb71e9564b7dab2e58e8f6a2aad26396594","last_reissued_at":"2026-05-18T03:09:32.541651Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:09:32.541651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.5738","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":"2026-05-18T03:09:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W+O3CPuBMAkya75PPVfHZVoG54mXxLt/e1+Lo3Kp2KzS53SLIFHoYu13AUPiQTn9AsfTndFzNU98NK6gNj2PBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T14:20:30.703288Z"},"content_sha256":"df7bbc445cd3b21f4b27560a0436fa7ed1405cdc96df11ec49725df9783d6ce2","schema_version":"1.0","event_id":"sha256:df7bbc445cd3b21f4b27560a0436fa7ed1405cdc96df11ec49725df9783d6ce2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:RI2O6KRPHHKBHPT2V6X27UAMW4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Kernel for Hierarchical Parameter Spaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"stat.ML","authors_text":"Frank Hutter, Michael A. Osborne","submitted_at":"2013-10-21T22:02:17Z","abstract_excerpt":"We define a family of kernels for mixed continuous/discrete hierarchical parameter spaces and show that they are positive definite."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5738","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":"2026-05-18T03:09:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PI375FmpZVHsc4nn4LTNhpb8qTt24WIN2GieBItjM1c0rp5VGcKVmCSbZwUu2jNXEuRi+klbYov9zaVX9u0JBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T14:20:30.703731Z"},"content_sha256":"c8028455a321da7610004cb3cda096f2d34deeef9746bd047ef2d5673907b0be","schema_version":"1.0","event_id":"sha256:c8028455a321da7610004cb3cda096f2d34deeef9746bd047ef2d5673907b0be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/bundle.json","state_url":"https://pith.science/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/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":"2026-08-10T14:20:30Z","links":{"resolver":"https://pith.science/pith/RI2O6KRPHHKBHPT2V6X27UAMW4","bundle":"https://pith.science/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/bundle.json","state":"https://pith.science/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RI2O6KRPHHKBHPT2V6X27UAMW4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:RI2O6KRPHHKBHPT2V6X27UAMW4","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":"969aa733ac418b0b0c228f3f93d5ed025e44f2c054436d3ea54a55ab1de7d0f3","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ML","submitted_at":"2013-10-21T22:02:17Z","title_canon_sha256":"c5ff8eabd694bebbbb0141dd49f0c35f2d0235cf17c66fb126364d02ca0428f0"},"schema_version":"1.0","source":{"id":"1310.5738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.5738","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"arxiv_version","alias_value":"1310.5738v1","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.5738","created_at":"2026-05-18T03:09:32Z"},{"alias_kind":"pith_short_12","alias_value":"RI2O6KRPHHKB","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"RI2O6KRPHHKBHPT2","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"RI2O6KRP","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:c8028455a321da7610004cb3cda096f2d34deeef9746bd047ef2d5673907b0be","target":"graph","created_at":"2026-05-18T03:09:32Z","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 define a family of kernels for mixed continuous/discrete hierarchical parameter spaces and show that they are positive definite.","authors_text":"Frank Hutter, Michael A. Osborne","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ML","submitted_at":"2013-10-21T22:02:17Z","title":"A Kernel for Hierarchical Parameter Spaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5738","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:df7bbc445cd3b21f4b27560a0436fa7ed1405cdc96df11ec49725df9783d6ce2","target":"record","created_at":"2026-05-18T03:09:32Z","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":"969aa733ac418b0b0c228f3f93d5ed025e44f2c054436d3ea54a55ab1de7d0f3","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ML","submitted_at":"2013-10-21T22:02:17Z","title_canon_sha256":"c5ff8eabd694bebbbb0141dd49f0c35f2d0235cf17c66fb126364d02ca0428f0"},"schema_version":"1.0","source":{"id":"1310.5738","kind":"arxiv","version":1}},"canonical_sha256":"8a34ef2a2f39d413be7aafafafd00cb71e9564b7dab2e58e8f6a2aad26396594","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a34ef2a2f39d413be7aafafafd00cb71e9564b7dab2e58e8f6a2aad26396594","first_computed_at":"2026-05-18T03:09:32.541651Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:09:32.541651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QSHainNBtFEQlCmc5qfDOWLXA40EfUtOG7Q2vQpU/Z20t1RmO5JmS+MPboaoeh8ApE/jp0fiemWDraSd+O0bDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:09:32.542140Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.5738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df7bbc445cd3b21f4b27560a0436fa7ed1405cdc96df11ec49725df9783d6ce2","sha256:c8028455a321da7610004cb3cda096f2d34deeef9746bd047ef2d5673907b0be"],"state_sha256":"100410ebf31b42bd6e8bc054ec899ef9c28bac4aa2be6fa6d4c9b9f305c60560"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K50j5hq18lnkINyZnmO6aSMKO+LoMSkhKlXMV9OS601ihIWaZO+AdBpDqai/ux0QS3zte38S/BM4JnsJ79FnAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T14:20:30.708477Z","bundle_sha256":"bdbc2c5af7c1176cfc2f30819551f0a40651fe9535e6543025e9d86a423fc7c5"}}