An integral equation related to the exterior riemann-hilbert problem on region with corners by Zamzamir, Zamzana, Ismail, Munira, Mohamed Murid, Ali Hassan

“…Nasser in 2005 gives the first full method for solving the Riemann-Hilbert problem (briefly the RH problem) for smooth arbitrary simply connected region for general indices via boundary integral equation. …”
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An integral equation method for solving neumann problems in simply connected regions with smooth boundaries by M. Murid, Ali H., Husin, Ummu Tasnim, Rahmat, Hamisan

“…This paper presents a new method for solving the interior Neumann problem in a simply connected region. The method is based on recent investigations on the interplay of Riemann-Hilbert (RH) problems and Fredholm integral equations with generalized Neumann kernel. …”