TY - BOOK AU - Varga,R.S. TI - Functional Analysis and Approximation theory in numerical analysis T2 - CBMS-NSF Regional conference series in applied mathematics SN - 0-89871-003-0 PY - 1991/// CY - Pensylvania PB - The Society for industrial and applied mathematics KW - Aproximación, Teoría de KW - Análisis funcional ER -