Existence of non-standard ideals in the formal power series algebra $$\pmb {{\mathfrak {F}}({\mathbb {Z}}_{+}^{2}; {\mathbb {C}})}$$ F ( Z + 2 ; C )
H. V. Dedania () and
K. R. Baleviya ()
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H. V. Dedania: Sardar Patel University
K. R. Baleviya: Sardar Patel University
Indian Journal of Pure and Applied Mathematics, 2024, vol. 55, issue 4, 1160-1165
Abstract:
Abstract This article serves four purposes: (1) A complete characterization of semigroup ideals in $${\mathbb {Z}}_{+}^{2}$$ Z + 2 is given; (2) The concept of standard ideals is defined in most general set up; (3) Unlike the algebra $${\mathfrak {F}}({\mathbb {Z}}_{+};{\mathbb {C}})$$ F ( Z + ; C ) , there is a non-standard ideal in the algebra $${\mathfrak {F}}({\mathbb {Z}}_{+}^{2};{\mathbb {C}})$$ F ( Z + 2 ; C ) ; and (4) This is a first step in the direction of studying standard closed ideals in $$\ell ^1({{\mathbb {Z}}}_+^2, \, \omega )$$ ℓ 1 ( Z + 2 , ω ) . It is also proved that, under a certain condition on $$f\in {\mathfrak {F}}({\mathbb {Z}}_{+}^{2};{\mathbb {C}})$$ f ∈ F ( Z + 2 ; C ) , the ideal $$I_{f}=f *{\mathfrak {F}}({\mathbb {Z}}_{+}^{2};{\mathbb {C}})$$ I f = f ∗ F ( Z + 2 ; C ) is always a standard ideal. Though the proofs are elementary, the results will give more clarity about standard ideals in the formal power series algebras.
Keywords: Semigroup; Semigroup ideal; Algebra; Standard ideals; And Non-standard ideals; Primary 16D25; Secondary 20M12; 46H10 (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s13226-023-00416-z
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