The uniqueness of meromorphic functions that share four values are investigated, some results are obtained to show that if two nonconstant entire functions shar
<正>The present paper proves that if f(x)∈C[0,1],changes its sign exactly l times at 0<y1<y2< <y1<1 in (0,1), then there exists a pn(x)∈∏n(+), such that whic
In this paper we establish direct local and global approximation theorems for Baskakov type operators and Szász - Mirakjan type operators, respectively.