The distributivity numbers of of P(om) /fin and its square
classification
🧮 math.LO
keywords
omegadistributivityforcingcountableiterationlengthmathiasmodel
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We show that in a model obtained by forcing with a countable support iteration of length omega_2 of Mathias forcing h(2), the distributivity number of r.o.(P(omega)/fin)^2, is omega_1 but h, the one of P(omega)/fin, is omega_2.
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