TY - JOUR AU - P.N. Natarajan TI - The Schur and Steinhaus Theorems for 4-Dimensional Matrices in Ultrametric Fields JO - Commentationes Mathematicae PY - 2011 SP - 203 EP - 209 VL - 51 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v51i2.5321/ DO - 10.14708/cm.v51i2.5321 LA - pl ID - 10_14708_cm_v51i2_5321 ER -