, 15 2008 . 13:36
+
sarthur
- -
idempotent.
, , , ""
... . :
idempotent
1)
2)
3)
completely primary idempotent -
completely primitive idempotent -
idempotent separating congruence -
"" :
- ,
"" :
...
( ).
, -
.
PS. , , ,
X * X = X
.., , , .
0 1 "".
.
: