{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SRICMUKLEP2GFKCEOL5HEEFW3G","short_pith_number":"pith:SRICMUKL","canonical_record":{"source":{"id":"1701.00726","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-03T15:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"d643d9f7305b080020be466ff02be1ec66fd4a0eb5034703e38cd911c03a18c1","abstract_canon_sha256":"b855e3efc52f9e21dcab8462d14032ad1821d50db4aab8dd4ae60e86b7600923"},"schema_version":"1.0"},"canonical_sha256":"945026514b23f462a84472fa7210b6d9b0f50018e8fe78266a2e1746900df44a","source":{"kind":"arxiv","id":"1701.00726","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.00726","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"arxiv_version","alias_value":"1701.00726v1","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.00726","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"pith_short_12","alias_value":"SRICMUKLEP2G","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SRICMUKLEP2GFKCE","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SRICMUKL","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SRICMUKLEP2GFKCEOL5HEEFW3G","target":"record","payload":{"canonical_record":{"source":{"id":"1701.00726","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-03T15:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"d643d9f7305b080020be466ff02be1ec66fd4a0eb5034703e38cd911c03a18c1","abstract_canon_sha256":"b855e3efc52f9e21dcab8462d14032ad1821d50db4aab8dd4ae60e86b7600923"},"schema_version":"1.0"},"canonical_sha256":"945026514b23f462a84472fa7210b6d9b0f50018e8fe78266a2e1746900df44a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:28.389580Z","signature_b64":"e3rdcbHITbUx6zFKVvvIV0YA7VfwzQErz7CYR+xisKeR4IyD+vNqbSBzjEWBiXZ098dYnZquTn9P6OZe9cNjCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"945026514b23f462a84472fa7210b6d9b0f50018e8fe78266a2e1746900df44a","last_reissued_at":"2026-05-18T00:53:28.389114Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:28.389114Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.00726","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":"2026-05-18T00:53:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yKd1l/MmdUa9YO0eO1xKZIwvCLECu2rg370Q8epHdwuEBuRmYpUwB94cp5r0ySZBd1+Zze6Ne7ry11KeBg7hAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:16:05.636450Z"},"content_sha256":"62664c300b43ca38f6843b3fd43c5a84faf5e911bb5fde4a47004f080393d77a","schema_version":"1.0","event_id":"sha256:62664c300b43ca38f6843b3fd43c5a84faf5e911bb5fde4a47004f080393d77a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SRICMUKLEP2GFKCEOL5HEEFW3G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the suitability of the Brillouin action as a kernel to the overlap procedure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Giannis Koutsou, Stephan Durr","submitted_at":"2017-01-03T15:39:26Z","abstract_excerpt":"We investigate the Brillouin action in terms of its suitability as a kernel to the overlap procedure, with a view on both heavy and light quark physics. We use the diagonal elements of the Kenney-Laub family of iterations for the sparse matrix sign function, since they grow monotonically and facilitate cascaded preconditioning strategies with different rational approximations to the sign function. We find that the overlap action with the Brillouin kernel is significantly better localized than the version with the Wilson kernel."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.00726","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":"2026-05-18T00:53:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4YmhUuESt7ZIEMrY0I6kIfp0BNRYrpRiSZZFGHkDTymGvEsudGPFd6dXStcXYDj7dY7WAgxZnmzv/4CKF246Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:16:05.637155Z"},"content_sha256":"cfa484ff5214f83a0ef3cdf0ab4f9a3e68ec92e319444d66e38207d7f665cb0c","schema_version":"1.0","event_id":"sha256:cfa484ff5214f83a0ef3cdf0ab4f9a3e68ec92e319444d66e38207d7f665cb0c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/bundle.json","state_url":"https://pith.science/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/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":"2026-06-08T01:16:05Z","links":{"resolver":"https://pith.science/pith/SRICMUKLEP2GFKCEOL5HEEFW3G","bundle":"https://pith.science/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/bundle.json","state":"https://pith.science/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SRICMUKLEP2GFKCEOL5HEEFW3G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SRICMUKLEP2GFKCEOL5HEEFW3G","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":"b855e3efc52f9e21dcab8462d14032ad1821d50db4aab8dd4ae60e86b7600923","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-03T15:39:26Z","title_canon_sha256":"d643d9f7305b080020be466ff02be1ec66fd4a0eb5034703e38cd911c03a18c1"},"schema_version":"1.0","source":{"id":"1701.00726","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.00726","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"arxiv_version","alias_value":"1701.00726v1","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.00726","created_at":"2026-05-18T00:53:28Z"},{"alias_kind":"pith_short_12","alias_value":"SRICMUKLEP2G","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SRICMUKLEP2GFKCE","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SRICMUKL","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:cfa484ff5214f83a0ef3cdf0ab4f9a3e68ec92e319444d66e38207d7f665cb0c","target":"graph","created_at":"2026-05-18T00:53:28Z","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 investigate the Brillouin action in terms of its suitability as a kernel to the overlap procedure, with a view on both heavy and light quark physics. We use the diagonal elements of the Kenney-Laub family of iterations for the sparse matrix sign function, since they grow monotonically and facilitate cascaded preconditioning strategies with different rational approximations to the sign function. We find that the overlap action with the Brillouin kernel is significantly better localized than the version with the Wilson kernel.","authors_text":"Giannis Koutsou, Stephan Durr","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-03T15:39:26Z","title":"On the suitability of the Brillouin action as a kernel to the overlap procedure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.00726","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":"sha256:62664c300b43ca38f6843b3fd43c5a84faf5e911bb5fde4a47004f080393d77a","target":"record","created_at":"2026-05-18T00:53:28Z","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":"b855e3efc52f9e21dcab8462d14032ad1821d50db4aab8dd4ae60e86b7600923","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-03T15:39:26Z","title_canon_sha256":"d643d9f7305b080020be466ff02be1ec66fd4a0eb5034703e38cd911c03a18c1"},"schema_version":"1.0","source":{"id":"1701.00726","kind":"arxiv","version":1}},"canonical_sha256":"945026514b23f462a84472fa7210b6d9b0f50018e8fe78266a2e1746900df44a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"945026514b23f462a84472fa7210b6d9b0f50018e8fe78266a2e1746900df44a","first_computed_at":"2026-05-18T00:53:28.389114Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:28.389114Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e3rdcbHITbUx6zFKVvvIV0YA7VfwzQErz7CYR+xisKeR4IyD+vNqbSBzjEWBiXZ098dYnZquTn9P6OZe9cNjCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:28.389580Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.00726","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62664c300b43ca38f6843b3fd43c5a84faf5e911bb5fde4a47004f080393d77a","sha256:cfa484ff5214f83a0ef3cdf0ab4f9a3e68ec92e319444d66e38207d7f665cb0c"],"state_sha256":"550ed034dae087ec46f944c3bbc3db35e65e2bfe880b461aa17bce34f19ee739"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kkYNgKcdcfKk/sz0kl4a3Uo9JFTJhVLEB3RW5QmUUyRGViUGUHRHf3E5xXJROsmJ88lRsWBNBCuB5T9nJXCUBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T01:16:05.641818Z","bundle_sha256":"76f1bbd90a4841f1e8a78e21d546a338ed8b2bff7b94f5edca2573b558ce4ca9"}}