This implies the vanishing of the discriminant of the original form.
The way to get around the problem is to use a discriminant in the record declaration.
The discriminant is the resultant of ax and ax and of degree 8 in the coefficients; since it is a rational and integral function of the fundamental invariants it is expressible as a linear function of A 2 and B; it is independent of C, and is therefore unaltered when C vanishes; we may therefore take f in the canonical form 6R 4 f = BS5+5BS4p-4A2p5.
Conclusions The MDAS is a highly consistent and reliable measure which has good discriminant and concurrent validity.
By discriminant Chapter Index Here a type can be given a discriminant so that a whole family of types may be declared.
