Talk:Plus construction
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Latest comment: 19 years ago by Pincheguey in topic Pincheguey's comment
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Pincheguey's comment
[edit]If the aforementioned subgroup is the entire fundamental group, this second step is unnecessary.
This statement is false. Also in this case you have to attach three-cells, one for each attached two-cell. Pincheguey 12:20, 21 June 2007 (UTC)