Blass, Andreas A model without ultrafilters. (English) Zbl 0365.02054 Bull. Acad. Pol. Sci., Sér. Sci. Math. Astron. Phys. 25, 329-331 (1977). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 15 Documents MathOverflow Questions: Without choice, can every homomorphism from a profinite group to a finite group be continuous? MSC: 03E35 Consistency and independence results 03E99 Set theory × Cite Format Result Cite Review PDF