- #1
Klaus_Hoffmann
- 86
- 1
given a Polynomial or a trigonometric Polynomial
[tex] K(z)= \sum_{n=0}^{N}a_{n}x^{n} [/tex] and
[tex] H(x)= \sum_{n=0}^{N}b_{n}e^{inx} [/tex]
is there a criterion to decide or to see if K(z) or H(x) have ONLY real roots
[tex] K(z)= \sum_{n=0}^{N}a_{n}x^{n} [/tex] and
[tex] H(x)= \sum_{n=0}^{N}b_{n}e^{inx} [/tex]
is there a criterion to decide or to see if K(z) or H(x) have ONLY real roots