Galois Theory and Advanced Linear Algebra by Rajnikant Sinha

Galois Theory and Advanced Linear Algebra by Rajnikant Sinha

Author:Rajnikant Sinha
Language: eng
Format: epub, pdf
ISBN: 9789811398490
Publisher: Springer Singapore


Next,

Suppose that .

Here . Also . Since , we have , that is, is an automorphism, and hence

Thus . Now, since and , we have . Since is an automorphism, is one-to-one. Since , we have , and hence . Since , we have

Case I: . For every ,

that is, for every , we have

This shows that is equal to the identity mapping Id of K. Let us denote this by . Thus and .

Case II: . For every ,

that is, for every , we have

Let us denote this by . Thus , and for every , we have

Also .



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