0 votes 0 votes Show that there is no infinite set $A$ such that $\mid A \mid < \mid Z^{+} \mid = ℵ_{0}.$ Set Theory & Algebra kenneth-rosen discrete-mathematics set-theory&algebra descriptive + – admin asked Apr 21, 2020 • edited Apr 21, 2020 by Lakshman Bhaiya admin 192 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.