Abstract We report the quantitative, chemoselective, and diastereospecific formation of defect‐free C‐shaped single S‐ M‐shaped consecutively fused double‐ triple‐expanded homochiral helicenes (all‐right ( P ) or all‐left M handed), in which two three expanded helicene subunits were exclusively together a helically winding manner, respectively, through trifluoroacetic acid‐promoted intramolecul...

In this paper, we obtain one-sided and two-sided Tauberian conditions of Landau Hardy types for (C,1,0) (C,0,1) summability methods improper double integrals under which convergence follows from integrals. We give similar results (C,1,1) method general, in terms the concepts slowly decreasing (resp. oscillating) strong functions different senses Ces?ro real or complex-valued locally integrable ...