A128809 - OEIS

A128809

Coefficients of the invariant of degree 30 associated with the icosahedral group.

1, 522, -10005, -10005, -522, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

REFERENCES

A. Erdelyi, Higher Transcendental Functions, McGraw-Hill, 1955, Vol. 3, p. 11.

F. Klein, Lectures on the Icosahedron ..., 2nd Rev. Ed., 1913; reprinted by Dover, NY, 1956; see p. 61.

S. Mukai, An Introduction to Invariants and Moduli, Cambridge, 2003; see p. 19.

LINKS

EXAMPLE

J = (x^30+y^30) + 522*(x^25*y^5-x^5*y^25) - 10005*(x^20*y^10+x^10*y^20).

CROSSREFS

Cf. A128808. The third invariant (which does not have its own entry) is f = x*y*(x^10+11*x^5*y^5-y^10).

KEYWORD

sign,fini,full

AUTHOR

STATUS

approved