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An admissible pair $(\\overline{X},D)$ consists of a three-dimensional compact K\\\"{a}hler manifold $\\overline{X}$ and a smooth anticanonical $K3$ divisor $D$ on $\\overline{X}$. If two admissible pairs $(\\overline{X}_1,D_1)$ and $(\\overline{X}_2,D_2)$ satisfy the {\\it gluing condition}, we can glue $\\overline{X}_1\\se"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1305.0074","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.DG","submitted_at":"2013-05-01T03:02:34Z","cross_cats_sorted":["math.AG"],"title_canon_sha256":"95d88f18b703a336b5cd0baa66ffebe86ec3da17eafb5bf0fd1513097ff688d4","abstract_canon_sha256":"ccb5b3714855ae2bdd2720ecd31b2856a5178dd3932fff5034bd959671e0d72f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:37:44.876440Z","signature_b64":"KhWW6uj/XYWW6giunTUJVtFn/+MhQm6Cy1VN35WoU/spQosOEdoZnW3UApiKhBPzhuuFCGU+2jdmuhsI8cS+Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a81f4c2fd35537f71547af26cb4d3b4e0a0770586b760f63356517a0db1cd78d","last_reissued_at":"2026-05-18T02:37:44.875863Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:37:44.875863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Doubling construction of Calabi-Yau threefolds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.AG"],"primary_cat":"math.DG","authors_text":"Mamoru Doi, Naoto Yotsutani","submitted_at":"2013-05-01T03:02:34Z","abstract_excerpt":"We give a differential-geometric construction and examples of Calabi-Yau threefolds, at least one of which is {\\it{new}}. 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