Ela Isometric Tight Frames
نویسنده
چکیده
A d × n matrix, n ≥ d, whose columns have equal length and whose rows are orthonormal is constructed. This is equivalent to finding an isometric tight frame of n vectors in R d (or C d), or writing the d × d identity matrix I = d n n i=1 P i , where the P i are rank 1 orthogonal projections. The simple inductive procedure given shows that there are many such isometric tight frames.
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