Abstract
We use recent results of Intriligator and
Wecht [1] to study the phase structure of 
= 1 super Yang-Mills theory with gauge group SU(Nc), a
chiral superfield in the adjoint, and Nf chiral superfields in
the fundamental representation of the gauge group. Our discussion
sheds new light on [1] and supports the
conjecture that the central charge a decreases under RG flows and
is non-negative in unitary four dimensional conformal field
theories.
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