Abstract
In this paper we study the growth and
-approximation, 1 ≤ δ ≤ ∞, of solutions (not necessarily entire) of Helmholtz-type equations. Moreover, we obtain the characterization of order and type of
∈
, 0 <
< ∞, in terms of decay of approximation errors
) and
,
= 1,2. Our results extend and improve the results obtained by McCoy [J. Approx. Theory 25 (1979), 153–168].