
Keywords: primary; 54A20; 54D30; 54D35; 54D70; 54D80; 54E15; Connector; Unimorphism; Quasi-uniformity; Pre-uniformity; Pre-quasi-uniformity; Concrete; U-selective map; Uniformity; Filter; U-Cauchy filter; Minimal U-Cauchy filter; Mixing filters; Weakly round filter