From PlanetMath :
The Galois group
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of a field extension
is the group of all field automorphisms FigureRender Error: Temporary directory not writable!
of
which fix 
(i.e., FigureRender Error: Temporary directory not writable!
for allFigureRender Error: Temporary directory not writable!
). The group operation is given by composition: for two automorphismsFigureRender Error: Temporary directory not writable!
, given byFigureRender Error: Temporary directory not writable!
andFigureRender Error: Temporary directory not writable!
, the productFigureRender Error: Temporary directory not writable!
is the composite of the two mapsFigureRender Error: Temporary directory not writable!
.The Galois group of a polynomial
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is defined to be the Galois group of the splitting field of
over .
December 3rd, 2006 at 9:43 pm
Comment里面的还是不好用，还要再调试一下:(
December 3rd, 2006 at 9:52 pm
不过字体对不上很难看啊。。。
December 4th, 2006 at 11:04 am
支持中文吗？借你的网站给我写作业吧：）
December 4th, 2006 at 11:06 am
ft，什么作业？
中文不在tex里面。。。