| http://www.w3.org/ns/prov#value | - (a) N input waveguides, where N is an integer at least as great as 16; (b) N output wave guides; and (c) a plurality of optical switches connecting said N input waveguides to said N output waveguides according to a CLOS architecture including: (i) a first stage including R Q???P networks of said switches, (ii) a second stage including P R???R networks of said switches, and (iii) a third stage incl
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