148 citations
- Research Institute for Astronomy and Astrophysics of MaraghIR63 papers
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5 papers · 1 filter
The upper topology and its relation with the projective modules
Abolfazl Tarizadeh
In this paper, first we obtain some new and interesting results on projective modules and on the upper topology of an ordinal number. Then it is shown that the rank map of a locall…
On the duality of c-fusion frames in Hilbert spaces
Asghar Rahimi, Zahra Darvishi, Bayaz Daraby
Improving and extending the concept of dual for frames, fusion frames and continuous frames, the notion of dual for continuous fusion frames in Hilbert spaces will be studied. It w…
Construction of Continuous Frames in Hilbert spaces
Asghar Rahimi, Bayaz Daraby, Zahra Darvishi
Extending the concept of frame to continuous frame, in this manuscript we will show that under certain conditions on the measure of and the dimension of $\h$ we can construct c…
Controlled K-frames in Hilbert Spaces
Asghar Rahimi, Shahram Najafzadeh, Mohamad Nouri
K-frames were recently introduced by L. Gǎvruta in Hilbert spaces to study atomic systems with respect to bounded linear operator. Also controlled frames have been recently introdu…
Controlled K-frames and their invariance under Compact Perturbation
Asghar Rahimi, Shahram Najafzadeh, Mohamad Nouri
K-frames were recently introduced by L. Gǎvruta in Hilbert spaces to study atomic systems with respect to bounded linear operator. Also controlled frames have been recently introdu…