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Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A, Matemáticas, 2021-07, Vol.115 (3), Article 107
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this paper we have given conditions on exponential polynomials
P
n
(
s
)
of Dirichlet type to be attained the equality between each of two pairs of bounds, called essential bounds,
a
P
n
(
s
)
,
ρ
N
and
b
P
n
(
s
)
,
ρ
0
associated with
P
n
(
s
)
. The reciprocal question has been also treated. The bounds
a
P
n
(
s
)
,
b
P
n
(
s
)
are defined as the end-points of the minimal closed and bounded real interval
I
=
[
a
P
n
(
s
)
,
b
P
n
(
s
)
]
such that all the zeros of
P
n
(
s
)
are contained in the strip
I
×
R
of the complex plane
C
. The bounds
ρ
N
,
ρ
0
are defined as the unique real solutions of Henry equations of
P
n
(
s
)
. Some applications to the partial sums of the Riemann zeta function have been also showed.