J_{2}.2

U_{3}(3).2  100 1a^{+} + 36a^{+} + 63a^{+}  3

Character Numbers: [ 1, 5, 7 ]

S_{1} S_{2} S_{3}
χ_{1} 1 36 63
χ_{2} 1 6 −7
χ_{3} 1 −4 3

Ramanujan Graphs: [ 2 ], [ 2, 3 ], [ 3 ]