Best Simultaneous Approximation in Lp, 0 < p < ∞

الملخص

      It is essential to study the best approximation of a finite multiple target functions in Lebesgue spaces  for. Here we study the approximation of  target functions, and call it Best Simultaneous Approximation (BSA). Also, we introduce some relations between that BSA and the best approximation of one target function. Those definitions are supported by examples that describe the relations as well.