Stagnation flow differential-algebraic equations

A brief explanation of differential-algebraic equations (DAE) facilitates a further mathematical discussion of the stagnation-flow equations. In general, DAEs are stated as a vector residual equation, where w is the dependent-variable vector and the prime denotes a time derivative. For the discussion here, it is convenient to consider a restricted class of DAEs called semi-explicit nonlinear DAEs, which are represented as... 

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