TY - JOUR AU - S. Kwapień AU - A. Pełczyński TI - The main triangle projection in matrix spaces and its applications JO - Studia Mathematica PY - 1970 SP - 43 EP - 67 VL - 34 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-34-1-43-67/ DO - 10.4064/sm-34-1-43-67 LA - en ID - 10_4064_sm_34_1_43_67 ER -