Short branches in Rudin-Frolík order

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Short branches in Rudin-Frolík order. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 25 (1984), issue 2, pp. 365

MSC: 04A20

References:

[1] E. Butkovičová: Long chains in Rudin-Frolík order. Comment. Math. Univ. Carolinae 24 (1983), 563-570. MR 0730151

[2] Z. Frolík: Sums of ultrafilters. Bull. Amer. Math. Soc. 73 (1967), 87-91. MR 0203676

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