%0 Journal Article %T On tree ideals %A Martin Goldstern %A Miroslav Repicky %A Saharon Shelah %A Otmar Spinas %J Mathematics %D 1993 %I arXiv %X Let l^0 and m^0 be the ideals associated with Laver and Miller forcing, respectively. We show that add (l^0) < cov(l^0) and add (m^0) < cov(m^0) are consistent. We also show that both Laver and Miller forcing collapse the continuum to a cardinal <= h . %U http://arxiv.org/abs/math/9311212v1