Journal Title
Title of Journal: Bull Malays Math Sci Soc
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Abbravation: Bulletin of the Malaysian Mathematical Sciences Society
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Publisher
Springer Singapore
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Authors: Yoo Young Koo Jae Kun Lim
Publish Date: 2014/12/03
Volume: 38, Issue: 3, Pages: 1177-1183
Abstract
We generalize the characterizations of the direct sum decomposition of a Hilbert space in terms of the angle R and using this result present another proof of the equality concerning the norms of the projections P and IP As an application to abstract frame theory we show that the ranges of the analysis operators of oblique dual frame sequences satisfy the the angle conditionThe authors thank the anonymous referees for their helpful suggestions which helped them to improve this article This research was supported by Basic Science Research Program through the National Research Foundation of Korea NRF funded by the Ministry of Education Science and Technology 20110008917
Keywords:
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