Department of Mathematics and Statistics;
Alex Ekwueme Federal University;
Ndufu-Alike;
Nigeria;
Department of Industrial Mathematics and Applied Statistics;
Ebonyi State University;
Abakaliki;
Nigeria;
Department of Industrial Mathematics;
David Umahi Federal University of Health Sciences;
Uburu;
Nigeria;
Real Banach Spaces; Pseudo-Convex Functions; Pseudo-Monotone Maps; Sub-Differentials; Lower Semi-Continuous Functions and Approximate Mean Value Inequality;