证明了一类乘积算子点谱的对称性并将其应用到Hamilton算子、反Hamilton算子上,最后举例说明了乘积算子数值域的一些性质.
Symmetry properties of point spectrum of two operators' product are studied. Then we apply it into Hamiltonian and anti- Hamiltonian operators. In the end of text, we give an example to show numerical range of AB, BA is not identical.