q Let N0(s) and M0(s) be stable and minimum phase spectral
factors:
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•
• Then P0= N0 / M0 is a normalized coprime factorization and (N0 Nz) and (M0 Np) form a pair of
normalized coprime factorizations of P.
• Thus
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•where r>0, -p/2<q< p/2, and