  Exact equations are proposed to describe g-function flows in integrable
boundary quantum field theories which interpolate between different conformal
field theories in their ultraviolet and infrared limits, extending previous
work where purely massive flows were treated. The approach is illustrated with
flows between the tricritical and critical Ising models, but the method is not
restricted to these cases and should be of use in unravelling general patterns
of integrable boundary flows between pairs of conformal field theories.
