Robert P. Munafo, 2008 Feb 11.

Definition : math. In set theories with cardinal counting systems, the third transfinite domain after Aleph-0 and Aleph-1.

If the generalized continuum hypothesis (GCH) were true, aleph2 would be the same as 2c. Generally, GCH is not taken to be true.

From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2013.     Mu-ency index
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