Suppose K is a subfield of R (so that F may be taken to be a subfield
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Suppose K is a subfield of R (so that F may be taken to be a subfield of C) and that /is irreducible of degree 3. Let D be the discriminant off Then (a) D > 0 if and only if /has three real roots. (b) D < 0 if and only if /has precisely one real root.
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Related Book For
Algebra Graduate Texts In Mathematics 73
ISBN: 9780387905181
8th Edition
Authors: Thomas W. Hungerford
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