Normal Factorization in $SL(2,Z)$ and the Confluence of Singular Fibers in Elliptic Fibrations

Juan D. Velez, Carlos A. Cadavid

In this article we obtain a result about the uniqueness of factorization in terms of conjugates of the matrix $U=(\xymatrix{1 & 1 0 & 1})$, of some matrices representing the conjug…