1. 1272 v >v, aphase where a = 1.753338 . lo+', b = -9.970409 . lo+', c = 2.265109. lo+', d = -2.56978. lo+', e = 1.455866. J = -3.294873.10+4. Theequationsfor the cu and E phases were taken from Equation A.7 and Table A.l of Reference [7]. The transition region is represented by a fifth order polynomial which has second order contact at two points, v, = 0.1071218 and I), = 0.1207042. The points v, and v, were adjusted until the polynomial matched the transition region found in Figure 4.7 of Reference [7]. Our third EOS is the cu phase of the aboveccluation applied over the entire range of v, yielding a convex relation. The fourth EOS is the above nonconvex equation. Both equations and their first and second derivatives are shown in Figure 2(b) .