Email-запись: <inline-formula><math display="inline"><semantics><mi mathvariant="bold-script">F</mi></semantics></math></inline-formula>-Contractions Endowed with Mann’s Iterative Scheme in Convex <inline-formula><math display="inline"><semantics><msub><mi mathvariant="bold-script">G</mi><mi mathvariant="bold-italic">b</mi></msub></semantics></math></inline-formula>-Metric Spaces