Sentence examples similar to if and only if indispensable from inspiring English sources

A reconstructed signal is acceptable if and only if PRD<9%.

Claim: \ if and only if \.

We show that Ttf=0 holds if and only if f=0.

if and only if.

If and, then if and only if.

(b) if and only if.

if and only if either.

So, if and only if.

Clearly, if and only if.

or if and only if.

(vi) if and only if.