PDF(421 KB)
A Theorem on the Existence of Nonprincipal Arithmetical Ultrafilters on ω
Fang Ting WANG
Acta Mathematica Sinica, Chinese Series ›› 2006, Vol. 49 ›› Issue (2) : 283-288.
PDF(421 KB)
PDF(421 KB)
A Theorem on the Existence of Nonprincipal Arithmetical Ultrafilters on ω
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