Affine subgroups of the affine Coxeter group with the same Coxeter number

Nazife Ozdes Koca, Mehmet Koca

Affine subgroups having the same Coxeter number with the affine Coxeter groups W(An), W(Dn), and W(En) are constructed by graph folding technique. The affine groups W(Cn) and W(Bn)…