CoCalc -- S1cmm.g

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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

Project: cocalc-sagemath-dev-slelievre

Path: gap4r8 / pkg / SCO-2017.09.10 / examples / orbifolds / S1cmm.g

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# cmm (c2mm)

# http://en.wikipedia.org/wiki/Wallpaper_group#Group_cmm

M := [ [1,2], [1,4], [2,3], [3,4] ];
G1 := Group( (1,2) );
G2 := Group( (3,4) );
V := Group( (1,2), (3,4) );
iso := rec( 1 := V, 2 := G1, 3 := V, 4 := G2 );
mu := [];

dim := 3;