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A121738 Dimensions of the irreducible representations of the simple Lie algebra of type F4 over the complex numbers, listed in increasing order. 8
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 (list; graph; refs; listen; history; text; internal format)



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


N. Bourbaki, Lie groups and Lie algebras, Chapter 4-6, Springer, 2002.

J. E. Humphreys, Introduction to Lie algebras and representation theory, Springer, 1997.


Andy Huchala, Table of n, a(n) for n = 1..20000

Andy Huchala, Java program

Wikipedia, F_4 (mathematics)


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.


The highest weight 0000 corresponds to the 1-dimensional 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 27-dimensional exceptional Jordan algebra.) The adjoint representation has dimension 52 (the third term in the sequence) and highest weight 1000.


(GAP) # see program at A121732


Cf. A121732, A121736, A121737, A121739, A104599, A121741.

Sequence in context: A252994 A288162 A214476 * A335475 A043331 A023701

Adjacent sequences:  A121735 A121736 A121737 * A121739 A121740 A121741




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



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Last modified March 7 06:47 EST 2021. Contains 341868 sequences. (Running on oeis4.)