{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:D5IF62VMPKS2YGEQWPPAY2NKFA","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":"bdd054abe655771492e03b240fe5ce5890465cdea6b0f6362d68b2d57813344a","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1999-03-05T20:45:26Z","title_canon_sha256":"1e3d4521563f8d125296c0543e3592b662b4d3f487606c0bdf74d6a1fb3f432d"},"schema_version":"1.0","source":{"id":"hep-th/9903052","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9903052","created_at":"2026-05-18T02:35:54Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9903052v4","created_at":"2026-05-18T02:35:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9903052","created_at":"2026-05-18T02:35:54Z"},{"alias_kind":"pith_short_12","alias_value":"D5IF62VMPKS2","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"D5IF62VMPKS2YGEQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"D5IF62VM","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:6058a2d62f6337b3c79a8a8e928d34724ca4d1e8c71187aec8c0772cd9859f57","target":"graph","created_at":"2026-05-18T02:35:54Z","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 show that it is possible to construct supersymmetric three-generation models of Standard Model gauge group in the framework of non-simply-connected elliptically fibered Calabi-Yau, without section but with a bi-section. The fibrations on a cover Calabi-Yau, where the model has 6 generations of SU(5) and the bundle is given via the spectral cover description, use a different description of the elliptic fibre which leads to more than one global section. We present two examples of a possible cover Calabi-Yau with a free involution: one is a fibre product of rational elliptic surfaces $dP_9$; a","authors_text":"Albrecht Klemm, Bjorn Andreas, Gottfried Curio","cross_cats":[],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1999-03-05T20:45:26Z","title":"Towards the Standard Model spectrum from elliptic Calabi-Yau"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9903052","kind":"arxiv","version":4},"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":"sha256:9df3f1c6e87715afb991fb6dd53e5bc3f304c13c5260996df1674ad2522d31cb","target":"record","created_at":"2026-05-18T02:35:54Z","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":"bdd054abe655771492e03b240fe5ce5890465cdea6b0f6362d68b2d57813344a","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1999-03-05T20:45:26Z","title_canon_sha256":"1e3d4521563f8d125296c0543e3592b662b4d3f487606c0bdf74d6a1fb3f432d"},"schema_version":"1.0","source":{"id":"hep-th/9903052","kind":"arxiv","version":4}},"canonical_sha256":"1f505f6aac7aa5ac1890b3de0c69aa282e02550df324a8f4edb0b1f20847dea1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f505f6aac7aa5ac1890b3de0c69aa282e02550df324a8f4edb0b1f20847dea1","first_computed_at":"2026-05-18T02:35:54.570311Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:54.570311Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KFxIZX88R/0aOI4bvfNLExgntpQ6J9XT8B8TVm6zmLvBRsCc7d0MY2b//XwFfSUVKrxNAxkp5ZwDyUKGBaWRBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:54.570929Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9903052","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9df3f1c6e87715afb991fb6dd53e5bc3f304c13c5260996df1674ad2522d31cb","sha256:6058a2d62f6337b3c79a8a8e928d34724ca4d1e8c71187aec8c0772cd9859f57"],"state_sha256":"63e682b545ba1814d5944e347dc64b26e515122d8ab5fee627e0466f14c0e672"}