Skip to main content
MathOverflow

Return to Answer

added 7 characters in body
Source Link
Bob Ruyle
Bob Ruyle
  • 21
  • 1
  • 3

There is a paper: Covering theory for graphs of groups, by Hyman Bass, Journal of Pure and Applied Algebra (1993) Volume: 89, Issue: 1-2, Pages: 3-47.

There is defined the notion of a covering of one graph of groups by another graph of groups. CoveringsAll such coverings of a given graph of groups are in correspondence with the subgroups of the fundamental group of the given graph of groups.

There is a paper: Covering theory for graphs of groups, by Hyman Bass, Journal of Pure and Applied Algebra (1993) Volume: 89, Issue: 1-2, Pages: 3-47.

There is defined the notion of a covering of one graph of groups by another graph of groups. Coverings of a given graph of groups are in correspondence with the subgroups of the fundamental group of the given graph of groups.

There is a paper: Covering theory for graphs of groups, by Hyman Bass, Journal of Pure and Applied Algebra (1993) Volume: 89, Issue: 1-2, Pages: 3-47.

There is defined the notion of a covering of one graph of groups by another graph of groups. All such coverings of a given graph of groups are in correspondence with the subgroups of the fundamental group of the given graph of groups.

Source Link
Bob Ruyle
Bob Ruyle
  • 21
  • 1
  • 3

There is a paper: Covering theory for graphs of groups, by Hyman Bass, Journal of Pure and Applied Algebra (1993) Volume: 89, Issue: 1-2, Pages: 3-47.

There is defined the notion of a covering of one graph of groups by another graph of groups. Coverings of a given graph of groups are in correspondence with the subgroups of the fundamental group of the given graph of groups.