{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:RVWFY7MEAPJUH7QTOJLUDWMIDL","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":"ff5c4359df46590dbdeb5d69e1150eba4a2b239d041252b37a18a6696babcade","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-04-17T09:55:57Z","title_canon_sha256":"b934854bda222b5e864efd57f5113256b08e7883768752e5945f15f9bfd0e43a"},"schema_version":"1.0","source":{"id":"2004.08146","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.08146","created_at":"2026-07-05T01:46:50Z"},{"alias_kind":"arxiv_version","alias_value":"2004.08146v2","created_at":"2026-07-05T01:46:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.08146","created_at":"2026-07-05T01:46:50Z"},{"alias_kind":"pith_short_12","alias_value":"RVWFY7MEAPJU","created_at":"2026-07-05T01:46:50Z"},{"alias_kind":"pith_short_16","alias_value":"RVWFY7MEAPJUH7QT","created_at":"2026-07-05T01:46:50Z"},{"alias_kind":"pith_short_8","alias_value":"RVWFY7ME","created_at":"2026-07-05T01:46:50Z"}],"graph_snapshots":[{"event_id":"sha256:62721edbe741e2488823f588a8b8227dfc47b79a1c3d51c710ccd91aeb3b5dd3","target":"graph","created_at":"2026-07-05T01:46:50Z","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/2004.08146/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Eigenvalues of the Hermitian Wilson-Dirac operator are of special interest in several lattice QCD simulations, e.g., for noise reduction when evaluating all-to-all propagators. In this paper we present a Davidson-type eigensolver that utilizes the structural properties of the Hermitian Wilson-Dirac operator $Q$ to compute eigenpairs of this operator corresponding to small eigenvalues. The main idea is to exploit a synergy between the (outer) eigensolver and its (inner) iterative scheme which solves shifted linear systems. This is achieved by adapting the multigrid DD-$\\alpha$AMG algorithm to a","authors_text":"Andreas Frommer, Artur Strebel, Francesco Knechtli, Ian Zwaan, Karsten Kahl, Matthias Rottmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-04-17T09:55:57Z","title":"A multigrid accelerated eigensolver for the Hermitian Wilson-Dirac operator in lattice QCD"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.08146","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:ce447e731ed6383e8c7ce03be7fbf6a36f44d870c76ea724c6348ac6c8864b24","target":"record","created_at":"2026-07-05T01:46:50Z","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":"ff5c4359df46590dbdeb5d69e1150eba4a2b239d041252b37a18a6696babcade","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-04-17T09:55:57Z","title_canon_sha256":"b934854bda222b5e864efd57f5113256b08e7883768752e5945f15f9bfd0e43a"},"schema_version":"1.0","source":{"id":"2004.08146","kind":"arxiv","version":2}},"canonical_sha256":"8d6c5c7d8403d343fe13725741d9881ae645c840265a99b68acfe292161c28ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d6c5c7d8403d343fe13725741d9881ae645c840265a99b68acfe292161c28ad","first_computed_at":"2026-07-05T01:46:50.923639Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:46:50.923639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ro/6AGNA4TELKnll1y6dxTL7TbI9FUcm3iV9x7LLc5+M9LMkH8JAAbxw7H4qfIE/M4GWiMrh8cT9IYRBFSGTCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:46:50.924059Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.08146","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce447e731ed6383e8c7ce03be7fbf6a36f44d870c76ea724c6348ac6c8864b24","sha256:62721edbe741e2488823f588a8b8227dfc47b79a1c3d51c710ccd91aeb3b5dd3"],"state_sha256":"e0bf9b9420f3ecb473914ed496862e167ee9e4d0482777751f7b63cc4bda685a"}