148 citations
- Research Institute for Astronomy and Astrophysics of MaraghIR63 papers
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7 papers · 1 filter
Controlled weaving frames in Hilbert spaces
Reza Rezapour, Asghar Rahimi, E. Osgooei +1
In this paper, we first introduce the notion of controlled weaving K-g-frames in Hilbert spaces. Then, we present sufficient conditions for controlled weaving K-g-frames in separab…
On the polymatroidal property of monomial ideals with a view towards orderings of minimal generators
Somayeh Bandari, Rahim Rahmati-Asghar
We prove that a monomial ideal generated in a single degree, is polymatroidal if and only if it has linear quotients with respect to the lexicographical ordering of the minimal…
Frame related operators for woven frames
Asghar Rahimi, Zahra Samadzadeh, Bayaz Daraby
A new notion in frame theory has been introduced recently under the name woven-weaving frames by Bemrose et. al. In the studying of frames, some operators like analysis, synthesis,…
Structural results on lifting, orthogonality and finiteness of idempotents
Abolfazl Tarizadeh, Pramod K. Sharma
In this paper, using the canonical correspondence between the idempotents and clopens, we obtain several new results on lifting idempotents. The Zariski clopens of the maximal spec…
Notes on finitely generated flat modules
Abolfazl Tarizadeh
In this article, the projectivity of finitely generated flat modules of a commutative ring are studied from a topological point of view. Then various interesting results are obtain…
U-cross Gram matrices and their invertibility
Peter Balazs, Mitra Shamsabadi, Ali Akbar Arefijamaal +1
The Gram matrix is defined for Bessel sequences by combining synthesis with subsequent analysis operators. If different sequences are used and an operator U is inserted we reach so…