Korovkin, P.P
Linear operators and approximation theory - Delhi Hindustan Publishing Corp. 1960 - 222 - International monographs on advanced mathematics and physics .
517.518.8 KOR 517.518.8 KOR
Linear operators and approximation theory - Delhi Hindustan Publishing Corp. 1960 - 222 - International monographs on advanced mathematics and physics .
517.518.8 KOR 517.518.8 KOR