The authors prove b(I) ≤ b_R(I) for every ideal I, characterize b_R(I) structurally, and show both numbers coincide for a range of definable ideals.
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Two $\mathfrak{b}$ or not two $\mathfrak{b}$?
The authors prove b(I) ≤ b_R(I) for every ideal I, characterize b_R(I) structurally, and show both numbers coincide for a range of definable ideals.