{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:BWN4T7K3I44TFNSPR6C77KILJA","short_pith_number":"pith:BWN4T7K3","canonical_record":{"source":{"id":"hep-lat/9809075","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-lat","submitted_at":"1998-09-11T15:44:14Z","cross_cats_sorted":[],"title_canon_sha256":"33e3bece5d3110b2a21820dae59de9122f8d45bd211ae2d844967b8ed65d4034","abstract_canon_sha256":"ea8c779cca79b2ef6b3819f91f547f94b3956e40399f00859f36ead047e550fa"},"schema_version":"1.0"},"canonical_sha256":"0d9bc9fd5b473932b64f8f85ffa90b4828194b9a1fbfe4a7a17cd52269dda8a1","source":{"kind":"arxiv","id":"hep-lat/9809075","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-lat/9809075","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"arxiv_version","alias_value":"hep-lat/9809075v1","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-lat/9809075","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"pith_short_12","alias_value":"BWN4T7K3I44T","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"BWN4T7K3I44TFNSP","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"BWN4T7K3","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:BWN4T7K3I44TFNSPR6C77KILJA","target":"record","payload":{"canonical_record":{"source":{"id":"hep-lat/9809075","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-lat","submitted_at":"1998-09-11T15:44:14Z","cross_cats_sorted":[],"title_canon_sha256":"33e3bece5d3110b2a21820dae59de9122f8d45bd211ae2d844967b8ed65d4034","abstract_canon_sha256":"ea8c779cca79b2ef6b3819f91f547f94b3956e40399f00859f36ead047e550fa"},"schema_version":"1.0"},"canonical_sha256":"0d9bc9fd5b473932b64f8f85ffa90b4828194b9a1fbfe4a7a17cd52269dda8a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:35:25.232573Z","signature_b64":"tBJVUCRc9fIUV7WcKN6Jw/HDy6mgd9q76wNF/BP7YOr1iBTp3bh/Tzaci+rzS/a2jSYU6PjGdGvdfXzc5yuADQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d9bc9fd5b473932b64f8f85ffa90b4828194b9a1fbfe4a7a17cd52269dda8a1","last_reissued_at":"2026-05-18T04:35:25.232028Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:35:25.232028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-lat/9809075","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":"2026-05-18T04:35:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EBW/RHi4A+PaT5bBDNPUvroUfWFZ1Bt0rDGe3egdmZDIzFFDM8X0+F8GVve/irRLXZrjzDd+hNLflOIOb4LfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:51:13.815790Z"},"content_sha256":"cd11374f85db54e0eadc2f3bcf7d15e8012399aa37a5339c32e9a7587d8b5711","schema_version":"1.0","event_id":"sha256:cd11374f85db54e0eadc2f3bcf7d15e8012399aa37a5339c32e9a7587d8b5711"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:BWN4T7K3I44TFNSPR6C77KILJA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SW action for the lattice Schwinger model","license":"","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"C.B. Lang, Ch. Hoelbling, R. Teppner","submitted_at":"1998-09-11T15:44:14Z","abstract_excerpt":"We study some aspects of the ${\\cal O}(a)$ improved Sheikholeslami-Wohlert (SW) action for the lattice Schwinger model. We find some improvement concerning the distribution of eigenvalues of the Dirac operator and of the masses but little or no improvement for rotational invariance of correlators or dispersion relations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-lat/9809075","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":"2026-05-18T04:35:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ke73SMzzp2gtVPSZxT+WUGxUek2FuqGwn+ygnhODSHI9UhQXDykBI5XhM2uEK9OfJJFk+dbqs/xAc6vnPm8ADA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:51:13.816671Z"},"content_sha256":"50109ce66cd7e9d9ebe32abf7c27b14fb7b303290095bb5167b673ca64e01a69","schema_version":"1.0","event_id":"sha256:50109ce66cd7e9d9ebe32abf7c27b14fb7b303290095bb5167b673ca64e01a69"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BWN4T7K3I44TFNSPR6C77KILJA/bundle.json","state_url":"https://pith.science/pith/BWN4T7K3I44TFNSPR6C77KILJA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BWN4T7K3I44TFNSPR6C77KILJA/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":"2026-05-31T18:51:13Z","links":{"resolver":"https://pith.science/pith/BWN4T7K3I44TFNSPR6C77KILJA","bundle":"https://pith.science/pith/BWN4T7K3I44TFNSPR6C77KILJA/bundle.json","state":"https://pith.science/pith/BWN4T7K3I44TFNSPR6C77KILJA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BWN4T7K3I44TFNSPR6C77KILJA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:BWN4T7K3I44TFNSPR6C77KILJA","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":"ea8c779cca79b2ef6b3819f91f547f94b3956e40399f00859f36ead047e550fa","cross_cats_sorted":[],"license":"","primary_cat":"hep-lat","submitted_at":"1998-09-11T15:44:14Z","title_canon_sha256":"33e3bece5d3110b2a21820dae59de9122f8d45bd211ae2d844967b8ed65d4034"},"schema_version":"1.0","source":{"id":"hep-lat/9809075","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-lat/9809075","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"arxiv_version","alias_value":"hep-lat/9809075v1","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-lat/9809075","created_at":"2026-05-18T04:35:25Z"},{"alias_kind":"pith_short_12","alias_value":"BWN4T7K3I44T","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"BWN4T7K3I44TFNSP","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"BWN4T7K3","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:50109ce66cd7e9d9ebe32abf7c27b14fb7b303290095bb5167b673ca64e01a69","target":"graph","created_at":"2026-05-18T04:35:25Z","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 study some aspects of the ${\\cal O}(a)$ improved Sheikholeslami-Wohlert (SW) action for the lattice Schwinger model. We find some improvement concerning the distribution of eigenvalues of the Dirac operator and of the masses but little or no improvement for rotational invariance of correlators or dispersion relations.","authors_text":"C.B. Lang, Ch. Hoelbling, R. Teppner","cross_cats":[],"headline":"","license":"","primary_cat":"hep-lat","submitted_at":"1998-09-11T15:44:14Z","title":"SW action for the lattice Schwinger model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-lat/9809075","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:cd11374f85db54e0eadc2f3bcf7d15e8012399aa37a5339c32e9a7587d8b5711","target":"record","created_at":"2026-05-18T04:35:25Z","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":"ea8c779cca79b2ef6b3819f91f547f94b3956e40399f00859f36ead047e550fa","cross_cats_sorted":[],"license":"","primary_cat":"hep-lat","submitted_at":"1998-09-11T15:44:14Z","title_canon_sha256":"33e3bece5d3110b2a21820dae59de9122f8d45bd211ae2d844967b8ed65d4034"},"schema_version":"1.0","source":{"id":"hep-lat/9809075","kind":"arxiv","version":1}},"canonical_sha256":"0d9bc9fd5b473932b64f8f85ffa90b4828194b9a1fbfe4a7a17cd52269dda8a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d9bc9fd5b473932b64f8f85ffa90b4828194b9a1fbfe4a7a17cd52269dda8a1","first_computed_at":"2026-05-18T04:35:25.232028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:35:25.232028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tBJVUCRc9fIUV7WcKN6Jw/HDy6mgd9q76wNF/BP7YOr1iBTp3bh/Tzaci+rzS/a2jSYU6PjGdGvdfXzc5yuADQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:35:25.232573Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-lat/9809075","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd11374f85db54e0eadc2f3bcf7d15e8012399aa37a5339c32e9a7587d8b5711","sha256:50109ce66cd7e9d9ebe32abf7c27b14fb7b303290095bb5167b673ca64e01a69"],"state_sha256":"fba4171fdc8c760e56c881a93de15042b156dde2fe1fdd839235388aaf8fbdd5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nxn0uvCTzQCEkaKN8w6hY6CPAukO41/JEdvkS0Yv+cwPbMxEXzluwqPjnZtyF0d18WsMPFyTmjaPLThl8WlyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T18:51:13.821127Z","bundle_sha256":"95fe9fd390c8648d606884c8351919fc604ea4b64537ad424d2ef40936517ef9"}}