2Â¥: Originally posted by hank612 at 2015-01-17 08:37:10
(4)
http://math.stackexchange.com/questions/449404/is-an-automorphism-of-the-field-of-real-numbers-the-identity-map

½â´ðRµÄÓò×Ôͬ¹¹Ö»Óкãͬ.  ¶ÔQ ¸ü¼òµ¥.
\phi(1)=1\Rightarrow \phi(n)=n \Rightar ...

2Â¥: Originally posted by hank612 at 2015-01-17 08:37:10
(4)
http://math.stackexchange.com/questions/449404/is-an-automorphism-of-the-field-of-real-numbers-the-identity-map

½â´ðRµÄÓò×Ôͬ¹¹Ö»Óкãͬ.  ¶ÔQ ¸ü¼òµ¥.
\phi(1)=1\Rightarrow \phi(n)=n \Rightar ...

2Â¥: Originally posted by hank612 at 2015-01-17 08:37:10
(4)
http://math.stackexchange.com/questions/449404/is-an-automorphism-of-the-field-of-real-numbers-the-identity-map

½â´ðRµÄÓò×Ôͬ¹¹Ö»Óкãͬ.  ¶ÔQ ¸ü¼òµ¥.
\phi(1)=1\Rightarrow \phi(n)=n \Rightar ...

5Â¥: Originally posted by Zachariah at 2015-01-18 16:50:54
µÚÒ»ÌâΪʲô|G/N  :   N/N|=|K   :   Q|
...

6Â¥: Originally posted by hank612 at 2015-01-19 02:17:57
ÒòΪG£¯N=K¡£PN£¯N=Q °¡¡£ ÕâЩ¶¼ÊÇ̬ͬÏñ'...