Exploiting Block Triangular form for Solving DAEs: Reducing the Number of Initial Values

The authors have written two codes to solve differential algebraic equations (DAEs) by structural analysis (SA). The first is written in C++ (Daets) and deals with the solution of DAE initial value problems, using SA. Upon seeing how informative the SA could be the authors wrote Daesa (in Matlab) to do only the structural analysis. These codes rely on exploiting the block triagular form (BTF) of a DAE, this chapter explains how.