{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:SNBJF7HPT6SKQREXLM2LPRMUR5","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":"7b1b58efb32cdf62ab477b7063c6dbf3d7634b429081a242cac3108fbe0d86fe","cross_cats_sorted":["gr-qc","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2011-04-19T16:41:08Z","title_canon_sha256":"13a886eabf9ba90755814264420b19608aed393b91f2d2a7929ba59b95a5ad1e"},"schema_version":"1.0","source":{"id":"1104.3799","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3799","created_at":"2026-05-18T02:02:22Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3799v1","created_at":"2026-05-18T02:02:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3799","created_at":"2026-05-18T02:02:22Z"},{"alias_kind":"pith_short_12","alias_value":"SNBJF7HPT6SK","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"SNBJF7HPT6SKQREX","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"SNBJF7HP","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:9b94c9bc12e3041670ea289bba26e6c6e53d18217ae4c62a198b51e8d4e4efff","target":"graph","created_at":"2026-05-18T02:02:22Z","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":"In this paper we present a number of four-dimensional neutral signature exact solutions for which all of the polynomial scalar curvature invariants vanish (VSI spaces) or are all constant (CSI spaces), which are of relevence in current theoretical physics.","authors_text":"A. Alcolado, A. Coley, A. MacDougall, S. Hervik","cross_cats":["gr-qc","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2011-04-19T16:41:08Z","title":"4D neutral signature VSI and CSI spaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3799","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":"sha256:9b97a10ed9bc2b45b478f3f78f02483944c5f3b9ba4dba5b78c379120a94ed5f","target":"record","created_at":"2026-05-18T02:02:22Z","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":"7b1b58efb32cdf62ab477b7063c6dbf3d7634b429081a242cac3108fbe0d86fe","cross_cats_sorted":["gr-qc","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2011-04-19T16:41:08Z","title_canon_sha256":"13a886eabf9ba90755814264420b19608aed393b91f2d2a7929ba59b95a5ad1e"},"schema_version":"1.0","source":{"id":"1104.3799","kind":"arxiv","version":1}},"canonical_sha256":"934292fcef9fa4a844975b34b7c5948f65376e4242a232787eda17507667ff6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"934292fcef9fa4a844975b34b7c5948f65376e4242a232787eda17507667ff6b","first_computed_at":"2026-05-18T02:02:22.657862Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:22.657862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mEUcgTOdBdAPCP2rSxO2rBvtmYvVXA8jOsndPkNS9JqpzadTaeKL9NRhU6s9b8F0bklkVkRhwal73ZM4RIy+AA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:22.659007Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.3799","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b97a10ed9bc2b45b478f3f78f02483944c5f3b9ba4dba5b78c379120a94ed5f","sha256:9b94c9bc12e3041670ea289bba26e6c6e53d18217ae4c62a198b51e8d4e4efff"],"state_sha256":"6dba04d74e00e5d757ab8d884e8b19afffbe434c8bc69e6c945e378bfe7e73ea"}