Note on E representations in
C13h character table



24 irreducible representations of point group C13h have complex values. 12 two-dimensional real-valued representations E can be constructed as direct sum of the 12 pairs complex plus conjugate complex irreducible representation.

E'1 = E'1a ⊕ E'1b
E'2 = E'2a ⊕ E'2b
E'3 = E'3a ⊕ E'3b
E'4 = E'4a ⊕ E'4b
E'5 = E'5a ⊕ E'5b
E'6 = E'6a ⊕ E'6b
E''1 = E''1a ⊕ E''1b
E''2 = E''2a ⊕ E''2b
E''3 = E''3a ⊕ E''3b
E''4 = E''4a ⊕ E''4b
E''5 = E''5a ⊕ E''5b
E''6 = E''6a ⊕ E''6b


ε=exp(2πi/13)
C13h E C13 (C13)2 (C13)3 (C13)4 (C13)5 (C13)6 (C13)7 (C13)8 (C13)9 (C13)10 (C13)11 (C13)12 σh S13 (S13)15 (S13)3 (S13)17 (S13)5 (S13)19 (S13)7 (S13)21 (S13)9 (S13)23 (S13)11 (S13)25
A' 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
E'1 E'1a
E'1b
1
1
ε*
ε*
ε2*
ε2*
ε3*
ε3*
ε4*
ε4*
ε5*
ε5*
ε6*
ε6*
ε6*
ε6*
ε5*
ε5*
ε4*
ε4*
ε3*
ε3*
ε2*
ε2*
ε*
ε*
1
1
ε*
ε*
ε2*
ε2*
ε3*
ε3*
ε4*
ε4*
ε5*
ε5*
ε6*
ε6*
ε6*
ε6*
ε5*
ε5*
ε4*
ε4*
ε3*
ε3*
ε2*
ε2*
ε*
ε*
E'2 E'2a
E'2b
1
1
ε2*
ε2*
ε4*
ε4*
ε6*
ε6*
ε5*
ε5*
ε3*
ε3*
ε*
ε*
ε*
ε*
ε3*
ε3*
ε5*
ε5*
ε6*
ε6*
ε4*
ε4*
ε2*
ε2*
1
1
ε2*
ε2*
ε4*
ε4*
ε6*
ε6*
ε5*
ε5*
ε3*
ε3*
ε*
ε*
ε*
ε*
ε3*
ε3*
ε5*
ε5*
ε6*
ε6*
ε4*
ε4*
ε2*
ε2*
E'3 E'3a
E'3b
1
1
ε3*
ε3*
ε6*
ε6*
ε4*
ε4*
ε*
ε*
ε2*
ε2*
ε5*
ε5*
ε5*
ε5*
ε2*
ε2*
ε*
ε*
ε4*
ε4*
ε6*
ε6*
ε3*
ε3*
1
1
ε3*
ε3*
ε6*
ε6*
ε4*
ε4*
ε*
ε*
ε2*
ε2*
ε5*
ε5*
ε5*
ε5*
ε2*
ε2*
ε*
ε*
ε4*
ε4*
ε6*
ε6*
ε3*
ε3*
E'4 E'4a
E'4b
1
1
ε4*
ε4*
ε5*
ε5*
ε*
ε*
ε3*
ε3*
ε6*
ε6*
ε2*
ε2*
ε2*
ε2*
ε6*
ε6*
ε3*
ε3*
ε*
ε*
ε5*
ε5*
ε4*
ε4*
1
1
ε4*
ε4*
ε5*
ε5*
ε*
ε*
ε3*
ε3*
ε6*
ε6*
ε2*
ε2*
ε2*
ε2*
ε6*
ε6*
ε3*
ε3*
ε*
ε*
ε5*
ε5*
ε4*
ε4*
E'5 E'5a
E'5b
1
1
ε5*
ε5*
ε3*
ε3*
ε2*
ε2*
ε6*
ε6*
ε*
ε*
ε4*
ε4*
ε4*
ε4*
ε*
ε*
ε6*
ε6*
ε2*
ε2*
ε3*
ε3*
ε5*
ε5*
1
1
ε5*
ε5*
ε3*
ε3*
ε2*
ε2*
ε6*
ε6*
ε*
ε*
ε4*
ε4*
ε4*
ε4*
ε*
ε*
ε6*
ε6*
ε2*
ε2*
ε3*
ε3*
ε5*
ε5*
E'6 E'6a
E'6b
1
1
ε6*
ε6*
ε*
ε*
ε5*
ε5*
ε2*
ε2*
ε4*
ε4*
ε3*
ε3*
ε3*
ε3*
ε4*
ε4*
ε2*
ε2*
ε5*
ε5*
ε*
ε*
ε6*
ε6*
1
1
ε6*
ε6*
ε*
ε*
ε5*
ε5*
ε2*
ε2*
ε4*
ε4*
ε3*
ε3*
ε3*
ε3*
ε4*
ε4*
ε2*
ε2*
ε5*
ε5*
ε*
ε*
ε6*
ε6*
A'' 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
E''1 E''1a
E''1b
1
1
ε*
ε*
ε2*
ε2*
ε3*
ε3*
ε4*
ε4*
ε5*
ε5*
ε6*
ε6*
ε6*
ε6*
ε5*
ε5*
ε4*
ε4*
ε3*
ε3*
ε2*
ε2*
ε*
ε*
-1
-1
*
*
2*
2*
3*
3*
4*
4*
5*
5*
6*
6*
6*
6*
5*
5*
4*
4*
3*
3*
2*
2*
*
*
E''2 E''2a
E''2b
1
1
ε2*
ε2*
ε4*
ε4*
ε6*
ε6*
ε5*
ε5*
ε3*
ε3*
ε*
ε*
ε*
ε*
ε3*
ε3*
ε5*
ε5*
ε6*
ε6*
ε4*
ε4*
ε2*
ε2*
-1
-1
2*
2*
4*
4*
6*
6*
5*
5*
3*
3*
*
*
*
*
3*
3*
5*
5*
6*
6*
4*
4*
2*
2*
E''3 E''3a
E''3b
1
1
ε3*
ε3*
ε6*
ε6*
ε4*
ε4*
ε*
ε*
ε2*
ε2*
ε5*
ε5*
ε5*
ε5*
ε2*
ε2*
ε*
ε*
ε4*
ε4*
ε6*
ε6*
ε3*
ε3*
-1
-1
3*
3*
6*
6*
4*
4*
*
*
2*
2*
5*
5*
5*
5*
2*
2*
*
*
4*
4*
6*
6*
3*
3*
E''4 E''4a
E''4b
1
1
ε4*
ε4*
ε5*
ε5*
ε*
ε*
ε3*
ε3*
ε6*
ε6*
ε2*
ε2*
ε2*
ε2*
ε6*
ε6*
ε3*
ε3*
ε*
ε*
ε5*
ε5*
ε4*
ε4*
-1
-1
4*
4*
5*
5*
*
*
3*
3*
6*
6*
2*
2*
2*
2*
6*
6*
3*
3*
*
*
5*
5*
4*
4*
E''5 E''5a
E''5b
1
1
ε5*
ε5*
ε3*
ε3*
ε2*
ε2*
ε6*
ε6*
ε*
ε*
ε4*
ε4*
ε4*
ε4*
ε*
ε*
ε6*
ε6*
ε2*
ε2*
ε3*
ε3*
ε5*
ε5*
-1
-1
5*
5*
3*
3*
2*
2*
6*
6*
*
*
4*
4*
4*
4*
*
*
6*
6*
2*
2*
3*
3*
5*
5*
E''6 E''6a
E''6b
1
1
ε6*
ε6*
ε*
ε*
ε5*
ε5*
ε2*
ε2*
ε4*
ε4*
ε3*
ε3*
ε3*
ε3*
ε4*
ε4*
ε2*
ε2*
ε5*
ε5*
ε*
ε*
ε6*
ε6*
-1
-1
6*
6*
*
*
5*
5*
2*
2*
4*
4*
3*
3*
3*
3*
4*
4*
2*
2*
5*
5*
*
*
6*
6*


Obviously the E representations are reducible. Nevertheless the E representations are treated often as irreducible representations and are called real-valued or pseudo irreducible representations. One should keep in mind that general statements for character tables fail for real-valued representations. For example:



Last update August, 12th 2020 by A. Gelessus, Impressum, Datenschutzerklärung/DataPrivacyStatement