Then he considers the case of algebraic numbers and obtains some results like the following: Every real algebraicnumberfield of finite degree is non-inductive;
然后着重在代数范围内进行讨论，得到下列的结果：每个有限次实代数数域都不是归纳域；
2
In the field of optical computing and parallel information processing, several number systems have been used for different arithmetic and algebraic operations.