The dimension of this is also the rank of A. 2. Dimensional analysis is concerned with determining such consistency and inferring whatever units are missing. Diophantine equations . A system of equations whose variables must be integer-valued. Directed tree search .
Examples are branch and bound and implicit enumeration .
Also see heuristic search . Directional derivative . Some require the convergence to be uniform. This accounts for the time value of money and arises naturally in financial models, such as a portfolio selection problem . In infinite horizon dynamic programming , the discount factor serves to make value iteration a contraction map .