Volume 9, Issue 1 A. M. Simões A transmission problem for the Helmholtz equation with higher order boundary conditions Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors A. M. Simões Find more articles with the same keywords boundary value problem Helmholtz equation Bessel potential space convolution type operator Fredholm operator higher order boundary condition Wiener-Hopf operator not normally solvable operators image normalization Find more articles with the same subject classes 35J05 35J25 47B35 35S05 47A53 45E10 47F05 35R25