{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:7EOZSI6PYBFDHJUJFH3564OUOF","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":"ab665a8c2ef5ba299f9b422c8ad692c13ece0e5b5f56706ab5a36a2175a93bd6","cross_cats_sorted":["stat.AP","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2009-01-15T11:21:33Z","title_canon_sha256":"e5656296ef5e3790bf7c4b6490c936e049d068717ab29c987e9394cc4ad2f577"},"schema_version":"1.0","source":{"id":"0901.2234","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2234","created_at":"2026-05-18T04:42:22Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2234v1","created_at":"2026-05-18T04:42:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2234","created_at":"2026-05-18T04:42:22Z"},{"alias_kind":"pith_short_12","alias_value":"7EOZSI6PYBFD","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7EOZSI6PYBFDHJUJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7EOZSI6P","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:2f2e743553488d132dc6c7e8080bb9354694054a7074626b53aa20b2e043907a","target":"graph","created_at":"2026-05-18T04:42:22Z","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":"Our goal is to estimate causal interactions in multivariate time series. Using vector autoregressive (VAR) models, these can be defined based on non-vanishing coefficients belonging to respective time-lagged instances. As in most cases a parsimonious causality structure is assumed, a promising approach to causal discovery consists in fitting VAR models with an additional sparsity-promoting regularization. Along this line we here propose that sparsity should be enforced for the subgroups of coefficients that belong to each pair of time series, as the absence of a causal relation requires the co","authors_text":"Guido Nolte, Klaus-Robert Mueller, Nicole Kraemer, Stefan Haufe","cross_cats":["stat.AP","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2009-01-15T11:21:33Z","title":"Sparse Causal Discovery in Multivariate Time Series"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2234","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:fd6128d8dbc908bd157a57b4d5256f25714659f9134300e5aa6890ca1edf7604","target":"record","created_at":"2026-05-18T04:42:22Z","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":"ab665a8c2ef5ba299f9b422c8ad692c13ece0e5b5f56706ab5a36a2175a93bd6","cross_cats_sorted":["stat.AP","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2009-01-15T11:21:33Z","title_canon_sha256":"e5656296ef5e3790bf7c4b6490c936e049d068717ab29c987e9394cc4ad2f577"},"schema_version":"1.0","source":{"id":"0901.2234","kind":"arxiv","version":1}},"canonical_sha256":"f91d9923cfc04a33a68929f7df71d47171b5bc3c4a3bd9f46b0fd499ef159f9a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f91d9923cfc04a33a68929f7df71d47171b5bc3c4a3bd9f46b0fd499ef159f9a","first_computed_at":"2026-05-18T04:42:22.217860Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:42:22.217860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Epo72Doo/0GkZeiSZrD+4dodxImQ/2G7Xl+IAj6nIyl8I+t6DmfhXXurfP6jEp6iKbwgb96/kFt4L/OnxhiCDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:42:22.218573Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.2234","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd6128d8dbc908bd157a57b4d5256f25714659f9134300e5aa6890ca1edf7604","sha256:2f2e743553488d132dc6c7e8080bb9354694054a7074626b53aa20b2e043907a"],"state_sha256":"c84285773ae8e2bc5531a4dc9dec5b27fbd33632c7b7a9aac0daa85cd3f82935"}