Publication Details:
Journal or Publication Title:
Armenian Journal of Mathematics=Հայկական մաթեմատիկական հանդես
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Creator:
Gardner, Robert B. ; Gladin, Matthew
Contributor(s):
Գլխ. խմբ.՝ Անրի Ներսեսյան ; Պատ. խմբ.՝ Լինդա Խաչատրյան ; Խմբ. տեղակալ՝ Ռաֆայել Բարխուդարյան
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Uncontrolled Keywords:
Location of Zeros of a Polynomial ; Quaternionic Polynomial ; Monotone Coefficients
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Abstract:
The Eneström-Kakeya theorem states that if P ( z ) = ∑ n ℓ = 0 a ℓ z ℓ is a polynomial of degree n with real coefficients satisfying 0 ≤ a 0 ≤ a 1 ≤ ⋯ ≤ a n , then all zeros of P lie in | z | ≤ 1 in the complex plane. Motivated by recent results concerning an Eneström-Kakeya "type" condition on the real and imaginary parts of complex coefficients, we give similar results with hypotheses concerning the real and imaginary parts of the coefficients of a quaternionic polynomial. We give bounds on the moduli of quaternionic zeros of such polynomials.
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General note:
Electronic Open Access Publication of the National Academy of Sciences of Armenia