Question: How to use the select command?

[Here's the original Question, restored as best I could.--Carl Love]


> 

restart; with(GroupTheory)

> 

``

> 

d := Perm([[1, 2, 3, 4, 5]]);

Perm([[1, 2, 3, 4, 5]])

 

Perm([[1, 3], [4, 6], [5, 7]])

(1)
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G := PermutationGroup({d, e});

GroupTheory:-PermutationGroup({thismodule, object}, )

(2)
> 

H := Elements(G):

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"A:=select(H[i]->PermOrder(H[i])=4,i=1..nops(H));"

Error, invalid operator parameter name

"A:=select(H[i]->PermOrder(H[i])=4,i=1..nops(H));"

 
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``

``


[The question was, of course, How to avoid the error?--Carl Love]

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