A polynomial p in a polynomial algebra over a field is called a test polynomial if any endomorphism of the polynomial al......

In this paper we give the following main results: (ⅰ) Let F(?) and G(?) be two free modules. Then F(?) and G(?) are sem......

Given an independence algebra 4 of infinite rank, we denote the endomorphism monoid and the automorphism group of A by E......

利用模的自同态,研究左整体维数LGD(R)≤n的环,得到了半单环和遗传环的新特征....