Certain domains of a new matrix constructed by Euler totient and its summation function

With the aid of the Euler totient function $ \varphi $ and its summation function $ \top $, a new matrix $ \Delta(\varphi, \top) = (\delta(\varphi, \top)_{nk}) $, where$ \delta(\varphi, \top)_{nk} = \left\{ \begin{array} [c]{ccl} \frac{(-1)^{n-k} \top(k)}{\varphi(n)}, & {n-1\leq k\leq n}, \\ 0, & \text{otherwise} \end{array} \right. $is constructed to define the domains $ \ell_p(\Delta(\varphi, \top)) $, $ \ell_\infty(\Delta(\varphi, \top)) $, and $ \ell_1(\Delta(\varphi, \top)) $. After obtaining the norms on these domains, it is proved that these spaces are linearly isomorphic to classical ones. Also, their dual spaces are determined. Finally, characterizations of several matrix mappings are stated and proved.

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Publication Details

Journal
AIMS Mathematics
Published
2025-01-01
DOI
https://doi.org/10.3934/math.2025329
Citations
1
Primary Topic
Approximation Theory and Sequence Spaces
Type
article
Field-Weighted Citation Impact
2.63
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article

Certain domains of a new matrix constructed by Euler totient and its summation function

Dilek Aydın, Merve İlkhan
1 citations
AIMS Mathematics
Approximation Theory and Sequence Spaces
2.63
article

Certain domains of a new matrix constructed by Euler totient and its summation function

Dilek Aydın, Merve İlkhan
article en
1 citations

Abstract

With the aid of the Euler totient function $ \varphi $ and its summation function $ \top $, a new matrix $ \Delta(\varphi, \top) = (\delta(\varphi, \top)_{nk}) $, where$ \delta(\varphi, \top)_{nk} = \left\{ \begin{array} [c]{ccl} \frac{(-1)^{n-k} \top(k)}{\varphi(n)}, & {n-1\leq k\leq n}, \\ 0, & \text{otherwise} \end{array} \right. $is constructed to define the domains $ \ell_p(\Delta(\varphi, \top)) $, $ \ell_\infty(\Delta(\varphi, \top)) $, and $ \ell_1(\Delta(\varphi, \top)) $. After obtaining the norms on these domains, it is proved that these spaces are linearly isomorphic to classical ones. Also, their dual spaces are determined. Finally, characterizations of several matrix mappings are stated and proved.

AIMS MathematicsVol. 10(3)
Düzce Üniversitesi (TR)
Reduced inequalities
Openalex Percentile: Top 13%
Approximation Theory and Sequence Spaces
2.63
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