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A005776

Exponents m_i associated with Weyl group W(E_8).

1, 7, 11, 13, 17, 19, 23, 29

OFFSET

1,2

COMMENTS

Numbers coprime to 30 in that number's reduced residue system. - Alonso del Arte, Oct 03 2017

REFERENCES

H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 141.

LINKS

Abel Jansma, E_8 Symmetry Structures in the Ising model, Master's thesis, University of Amsterdam, 2018.

MATHEMATICA

Select[Range[30], GCD[30, #] == 1 &] (* Alonso del Arte, Oct 03 2017 *)

PROG

(Magma) Exponents(RootDatum("E8")); // Sergei Haller (sergei(AT)sergei-haller.de), Dec 21 2006

(PARI) select(n->gcd(n, 30)==1, [1..29]) \\ Charles R Greathouse IV, Oct 17 2017

CROSSREFS

KEYWORD

nonn,fini,full

AUTHOR

STATUS

approved

URL: https://oeis.org/A005776