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We have shown that two$-$dark$"},"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":"1110.3108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.SI","submitted_at":"2011-10-14T02:02:56Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"48a700444292d4d9fe4a2e72d66351aeef8bd49f3bcd7a57fe27924e9b20310c","abstract_canon_sha256":"ad886556124b53b51a00dc024217ed1e5c1154c7ec333618a6bb8dd40d924ba0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:10:58.051450Z","signature_b64":"mW1862iV0pVIUolZfX17vM3LlQLFeUmov1hdCiSgkOsLlDrTTzXxM181bZOeHyDw2UYje0h7Z5jTSBjleCE2Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82468cd651d1dee08d815ee78e1cf2a83fcf4df2dfc7f82b5cac5450e6a77540","last_reissued_at":"2026-05-18T04:10:58.051014Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:10:58.051014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Generalized AKNS System, Non-vanishing Boundary Conditions and N-Dark-Dark Solitons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math-ph","math.MP"],"primary_cat":"nlin.SI","authors_text":"A. de O. 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