nCD-WOa compact disc on which you can write only once and thereafter is read-only memory
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Usage
In science:
In the commutative case the factorization parameters for x ∈ Gu,v , G = GLn , u = id, v = wo are given as ratios ab/cd or a/b where a, b, c, d are minors of matrix x (see ).
Noncommutative Double Bruhat cells and their factorizations