000 00305nam a2200109 4500
008 160616s 000 0
245 _aBest approxiamtion in normed linear spaces by elements of linear subspaces
100 _aSinger, Ivan
500 _aB434,1 L0
942 _cBK
_2BK3208
080 _a517.518.8 SIN
999 _c3208
_d3208