ArticleESSENTIAL SPECTRUM OF A 2X2 OPERATOR MATRIX AND THE FADDEEV EQUATIONDilmurodov Elyor Baxtiyorovich·Rasulov Tulkin Husenovich·2020·enABIABI:AkademIndex/openalex/2026.other.915749CiteAbstractNo abstract available.Citations and referencesCited by 30 referencesMetrics — AkademScholar