On │Ñ Pn ׀k | Summability Factors of Infinite Series
Radii of Valence of Certain Analytic Functions with Negative Coefficients
A Theorem on the Geometric Mean of an Entire Function
Helmholtz Equation and WKB Approximation in the Tidal wawe Propagation
Comparison and Oscillation Theorems for singular Ultrahyperbolic Equations
The Interior and Exterior Problems For The Generalized Poly-Axially Symmetric Helmholtz Equation