000 00364nam a2200121Ia 4500
008 230727s9999||||xx |||||||||||||| ||und||
041 _aeng
082 _bN74 SIN
100 _a Singer, Ivan
_93363
245 0 _a Theory of best approximation and functional analysis
_c Singer, Ivan
260 _b Society for Industrial and Applied Mathematics
_c1974
942 _cBK
999 _c19481
_d19481