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MathGroup Archive 2007

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Question about Part

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74943] Question about Part
  • From: P_ter <peter_van_summeren at yahoo.co.uk>
  • Date: Thu, 12 Apr 2007 04:50:25 -0400 (EDT)

Hello,
I still do not understand Part. Please help me.
this is the expression:
� = ë0[ë1[ë2[ë3[1, 1, 1], ë3[1, 1, 2], ë3[1, 1, 3]],
ë2[ë3[1, 2, 1], ë3[1, 2, 2], ë3[1, 2, 3]],
ë2[ë3[1, 3, 1], ë3[1, 3, 2], ë3[1, 3, 3]]],
ë1[ë2[ë3[2, 1, 1], ë3[2, 1, 2], ë3[2, 1, 3]],
ë2[ë3[2, 2, 1], ë3[2, 2, 2], ë3[2, 2, 3]],
ë2[ë3[2, 3, 1], ë3[2, 3, 2], ë3[2, 3, 3]]],
ë1[ë2[ë3[3, 1, 1], ë3[3, 1, 2], ë3[3, 1, 3]],
ë2[ë3[3, 2, 1], ë3[3, 2, 2], ë3[3, 2, 3]],
ë2[ë3[3, 1, 3], ë3[3, 2, 3], ë3[3, 3, 3]]]];
I do not get why: Ã?[[{1, 2, 3}, 1, {1, 2, 3}, 1]]
gets as result: ë0[ë2[1, 1, 1], ë2[2, 2, 2], ë2[3, 3, 3]]

My difficulties arises when I see that:Ã?[[{1, 2, 3}, 1, {1, 2, 3}]] does not contain the last two parts of the above answer of Mathematica.
Hope, someone can explain.
P_ter


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