Errata for "PBiTree Coding and Efficient Processing of Containment Joins" 

1) Lemma 4 (Page 4): "n>>h can serve as" should be "n>>(h+1) can serve
   as".
 
2) Sec 3.1, Ln 10, Col 1 (Page 6): "use Anc_Des_B+)" should be "use
   Anc_Des_B+".

3) Sec 1, Ln 26, Col 1 (Page 1): "[16] proposed converting" should be
   "[5] proposed converting".	

4) Sec 4.1.3, Ln 6 (Page 9): "min( |A| , |D| )" should be "min( ||A||
   , ||D|| )".