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1/2A带+I带+1/2A带 1/2A带+H带+1/2A带 1/2I带+H带+1/2I带 1/2I带+M线+1/2I带 1/2I带+A带+1/2I带
a1-a2,a2-a3,a3-a1 a1+a2,a2+a3,a3+a1 a1-2a2,a2-2a3,a3-2a1 a1+2a2,a2+2a3,a3+2a1
a+a=a2 3a2﹣2a3=1 3a3﹣2a2=a ﹣a2+2a2=a2
a4+a5=a9 (2a2b3)2=4a4b6 ﹣2a(a+3)=﹣2a2+6a (2a﹣b)2=4a2﹣b2
a+a=2a2 a2·a=2a2 (-ab)2=2ab2 (2a)2 ÷a=4a
1/2A带+1个I带+1/2A带 1/2I带+1/2I带+1个A带 1/2A带+1个H带+1/2A带 1/2I带+1个A带+1/2I带
3a·2a=5a 3a·2a=5a2 3a·2a=6a 3a·2a=6a2
a3•a2=a6 a3+a2=2a5 (2a2)3=2a6 2a6÷a2=2a4
a→a→a a→2a→2a a→2a→a 2a→2a→a
a+a=a2 a2·a2=2a2 (-ab)2=-2a2b2 (2a)2÷a=4a
δ 2A =δ 2B =0 δ 2A >δ 2B >0 0<δ 2A <δ 2B δ 2A =δ 2B >0
3a,2a,a 3a,3a,3a a,2a,3a 2a,2a,2a
1/2I带+A带 1/2A带+I带 1/2I带+1/2A带 1/2A带+I带+1/2A带 1/2I带+1A带+1/2I带
δ 2A =δ 2B =0 δ 2A >δ 2B >0 δ 2A <δ 2B <0 δ 2A =δ 2B >0
1/2I带+A带 1/2A带+I带 1/2I带+1/2A带 1/2A带+I带+1/2A带 1/2I带+1A带+1/2I带
δ2A≈δ2B≈0 δ2A<δ2B<0 δ2A≈δ2B>0 δ2A>δ2B>0
a→a→a a→2a→2a a→2a→a 2a→2a→a