楼主: Atato

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乌木

魔方贵宾

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11^#

发表于 2008-8-26 17:29:47 |只看该作者

1楼内容更新后，条件更苛刻了，只转两个面之外，还要不翻色邻块互换啊！此题蛮难的，不管答案是肯定的还是否定的，都得有理论指点啊。

[ 本帖最后由乌木于 2008-8-26 17:32 编辑 ]

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kexin_xiao

银魔

小欣然的爸爸

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12^#

发表于 2008-8-27 10:02:04 |只看该作者

乌木老师都迷糊了，我就不想了，有差距，呵呵

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pengw

资深版主

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13^#

发表于 2008-8-27 10:09:30 |只看该作者

N阶定律讨论的变换是指公式的结果而不是公式自身，N阶定律对一个结果是选用什么公式来实现好像并不在乎，只对可能产生什么样的结果感兴趣，所以我以不知道如果回答啊，这个问题可能还是要研究最小步的大师来回答

[ 本帖最后由 pengw 于 2008-8-27 10:12 编辑 ]

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pengw

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14^#

发表于 2008-8-27 11:19:08 |只看该作者

替代最小步大师试着分析一下

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5</TD>
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6</TD></TR>
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C</TD>
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4</TD>
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2</TD>
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5</TD>
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3</TD>
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6</TD>
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1</TD></TR>
<TR style="HEIGHT: 15.75pt; mso-yfti-irow: 3; mso-yfti-lastrow: yes">
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
D</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
1</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
2</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
4</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
3</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
5</TD>
<TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 58.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=78>
6</TD></TR></TBODY></TABLE>
ffice<IMG alt=

src="http://bbs.mf8-china.com/images/smilies/default/shocked.gif" border=0 smilieid="6">ffice" /><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com

ffice

ffice" /><o:p> </o:p>
A行代表复原状态的5个块，其中1，2，3，4位于同一层，称为上层。5、6位于下层
B行代表向右的一次四元置换，生成四元环（4，1，2，3），显然靠上层转动是完法形成单一二元环
C行引入底层二个块5、6到上层，B行的6，5，2，1进行一次向左的四元置换，
D对C行的4，5，6，1进行一次向右的四元置换，最终生成独立二园环（4，3）
说明：
以上的二元置换不计相似变换步数，至少也要三步，事实上是不可能的。然而，在第C行将5，6调入上层已动到侧层，而C行的置换顺序是6，5，2，1实际上是5,6,2,1，要调整这个顺序，必须动用底层，由此二底加一侧都动了，即楼主所说的三面至少动一次。
 
 
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注意，不基于最基本的四元置换去求证任何置换，在逻辑上都是站不脚的

[ 本帖最后由 pengw 于 2008-8-27 11:27 编辑 ]

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