

A121738


Dimensions of the irreducible representations of the simple Lie algebra of type F4 over the complex numbers, listed in increasing order.


6



1, 26, 52, 273, 324, 1053, 1274, 2652, 4096, 8424, 10829, 12376, 16302, 17901, 19278, 19448, 29172, 34749, 76076, 81081, 100776, 106496, 107406, 119119, 160056, 184756, 205751, 212992, 226746, 340119, 342056, 379848, 412776, 420147, 627912
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OFFSET

1,2


COMMENTS

We include "1" for the 1dimensional trivial representation and we list each dimension once, ignoring the possibility that inequivalent representations may have the same dimension.


REFERENCES

N. Bourbaki, Lie groups and Lie algebras, Chapter 46, Springer, 2002.
J. E. Humphreys, Introduction to Lie algebras and representation theory, Springer, 1997.


LINKS

Table of n, a(n) for n=1..35.
Wikipedia article on F<sub>4</sub>


FORMULA

Given a vector of 4 nonnegative integers, the Weyl dimension formula tells you the dimension of the corresponding irreducible representation. The list of such dimensions is then sorted numerically.


EXAMPLE

The highest weight 0000 corresponds to the 1dimensional module on which F4 acts trivially. The smallest faithful representation of F4 is the "standard" representation of dimension 26 (the second term in the sequence), with highest weight 0001. (This representation is typically viewed as the trace zero elements in a 27dimensional exceptional Jordan algebra.) The adjoint representation has dimension 52 (the third term in the sequence) and highest weight 1000.


PROG

(GAP) # see program at A121732


CROSSREFS

Cf. A121732, A121736, A121737, A121739, A104599, A121741.
Sequence in context: A122999 A040650 A214476 * A043331 A023701 A031459
Adjacent sequences: A121735 A121736 A121737 * A121739 A121740 A121741


KEYWORD

nonn


AUTHOR

Skip Garibaldi (skip(AT)member.ams.org), Aug 19 2006


STATUS

approved



