-- -*- M2-comint -*- hash: 16944598716898627759

i1 : G = cycleGraph 5;

i2 : hasEulerianTrail G

o2 = true

i3 : D = digraph(toList(1..4), {{1,2},{2,3},{3,4}});

i4 : hasEulerianTrail D

o4 = true

i5 : 
