. "Chajda, Ivan" . "difference algebra, skew difference algebra, sectional mapping, commutative directoid"@en . . . "287647" . . "1"^^ . "Skew difference algebra" . "RIV/61989592:15310/10:10215720!RIV11-MSM-15310___" . "Z(MSM6198959214)" . "We show that every skew difference algebra can be represented by a directoid with sectional switching involutions"@en . "RIV/61989592:15310/10:10215720" . "1225-6951" . "1" . . . . "We show that every skew difference algebra can be represented by a directoid with sectional switching involutions" . "Kyungpook Mathematical Journal" . "Skew difference algebra"@en . "50" . . . . "7"^^ . . "15310" . . "Skew difference algebra"@en . "Skew difference algebra" . . . "1"^^ . . "[623E0EFD4EB8]" . "KR - Korejsk\u00E1 republika" . .