Splitting families and complete separability
  We answer a question from Raghavan and Stepr{\=a}ns' paper on weakly tight families by showing that $\mathfrak{s} = {\mathfrak{s}}_{\omega, \omega}$. Then we use this to construct a completely separable maximal almost disjoint family under $\s \leq \a$, partially answering a question of Shelah. 
Heike Mildenberger, Dilip Raghavan, and Juris Stepr\=ans
math.LO