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group[center] - find the center of a given permutation group
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Calling Sequence
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center(pg)
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Parameters
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pg
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group in which the center is to be found
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Description
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This function finds the largest subgroup of the permutation group pg in which every element commutes with every element of pg. The result is returned as an unevaluated permgroup call.
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The command with(group,center) allows the use of the abbreviated form of this command.
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