TY - JOUR AU - J. MEINGUET TI - Optimal Approximation and Error Bounds in Seminormed Spaces. JO - Numerische Mathematik PY - 1967 SP - 370 EP - 388 VL - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1967__10_131796/ ID - NUMA_1967__10_131796 ER -