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I found a PDF for the deletion of B + tree here  : http://avid.cs.umass.edu/courses/445/f2008/17-tree-indexes-2.pdf

I have probelm with the initial B+ tree itself. What I have studied till date is that every node has a copy in the leaf nodes. But here they have not take the copy for the nodes . like copy of 13 and 17 and 30 is not present in the leafs. What I am doing wrong here.
 

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