{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IAT6RJDNNGP4D6QCR42GGTSIXS","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":"c64770c3cde4cf708fe4bf356ca78248367e00f714596b64ef51ec9658d5c3ff","cross_cats_sorted":["stat.TH"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.ST","submitted_at":"2018-07-27T18:34:40Z","title_canon_sha256":"8f723be33e9c4eed2f2e454aad49dde8f5b3d6b9508e5a588a674f93c3800beb"},"schema_version":"1.0","source":{"id":"1807.10785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10785","created_at":"2026-05-18T00:09:37Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10785v1","created_at":"2026-05-18T00:09:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10785","created_at":"2026-05-18T00:09:37Z"},{"alias_kind":"pith_short_12","alias_value":"IAT6RJDNNGP4","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"IAT6RJDNNGP4D6QC","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"IAT6RJDN","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:b4f0b62de4eee703fbbd4569b676f3e137c84e653e928d5849f33159768d6eee","target":"graph","created_at":"2026-05-18T00:09:37Z","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 consider a Gaussian contamination (i.e., mixture) model where the contamination manifests itself as a change in variance. We study this model in various asymptotic regimes, in parallel with the work of Ingster (1997) and Donoho and Jin (2004), who considered a similar model where the contamination was in the mean instead.","authors_text":"Ery Arias-Castro, Rong Huang","cross_cats":["stat.TH"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.ST","submitted_at":"2018-07-27T18:34:40Z","title":"The Sparse Variance Contamination Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10785","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":"sha256:9ffb09d328c3976d57602d6b6b1934ab17a972bc471bdc56b6fddafc4cd63628","target":"record","created_at":"2026-05-18T00:09:37Z","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":"c64770c3cde4cf708fe4bf356ca78248367e00f714596b64ef51ec9658d5c3ff","cross_cats_sorted":["stat.TH"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.ST","submitted_at":"2018-07-27T18:34:40Z","title_canon_sha256":"8f723be33e9c4eed2f2e454aad49dde8f5b3d6b9508e5a588a674f93c3800beb"},"schema_version":"1.0","source":{"id":"1807.10785","kind":"arxiv","version":1}},"canonical_sha256":"4027e8a46d699fc1fa028f34634e48bcb72f169926545b6d2ca72aa2afe95e43","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4027e8a46d699fc1fa028f34634e48bcb72f169926545b6d2ca72aa2afe95e43","first_computed_at":"2026-05-18T00:09:37.390824Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:37.390824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AVddIK8DPxmz1ovizENrTcNt6PAxH86IC+QUndYwGf80O69R0qdELlGdKg+3bdmGYr1Eo5AaF3gdrrQTvJLpCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:37.391438Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ffb09d328c3976d57602d6b6b1934ab17a972bc471bdc56b6fddafc4cd63628","sha256:b4f0b62de4eee703fbbd4569b676f3e137c84e653e928d5849f33159768d6eee"],"state_sha256":"203de5720cc1856d5ad0458e89ff6934d22f8f45e7417a0290dec2798dc3ca0f"}