๐”– Bobbio Scriptorium
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Pseudo-trees and Boolean algebras

โœ Scribed by Sabine Koppelberg; J. Donald Monk

Publisher
Springer Netherlands
Year
1992
Tongue
English
Weight
990 KB
Volume
8
Category
Article
ISSN
0167-8094

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## S(z A y ) z S(A), by (c) * S(z) A S(Y) 2 S(A) e S(x) 2 S(A) and S(y) 2 S(A) e C ( s ) s C ( A ) 'and C ( y ) E C ( A ) , by (c) o x โ‚ฌ C ( A ) and Y E C ( A ) . Now every ultrafilter is consistent and closed with respect to C, since if U is an ultrafilter and C ( U ) = X , then C({,uu,, . . ., ,