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Ultra Bessel sequences in direct sums of Hilbert spaces
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نویسنده
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Abdollahpour M. R. ,Rahimi A.
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منبع
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wavelets and linear algebra - 2015 - دوره : 2 - شماره : 1 - صفحه:55 -64
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چکیده
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In this paper, we establish some new results in ultra bessel sequences and ultra bessel sequences of subspaces. also, we investigate ultra bessel sequences in direct sums of hilbert spaces.specially, we show that {( fi, gi)}∞ i=1 is a an ultra bessel sequencefor hilbert space h ⊕ k if and only if { fi}∞ i=1 and {gi}∞ i=1 are ultrabessel sequences for hilbert spaces h and k, respectively.
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کلیدواژه
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Frame of subspaces ,Ultra Bessel sequence
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آدرس
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university of mohaghegh ardabili, Faculty of Mathematical Sciences, Department of Mathematics, ایران, university of maragheh, Department of Mathematics, ایران
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Authors
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