Set Size Comparison, Countability, 2 Essence of Set Theory

Watch my videos Ad-free & free: Odysee: https://odysee.com/@MiroslavOlsak:9?v... Vimeo: https://vimeo.com/user129589056 Download: http://olsak.net/mirek/manim/my_video... Definition of cardinality comparison, aleph_0 as the least infinite cardinality. Proof that there are aleph_0 many rational numbers but there are uncountable number of infinite binary sequences. Video download: http://www.olsak.net/mirek/manim/eost...