't Hooft symbol

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The 't Hooft η symbol is a symbol which allows one to express the generators of the SU(2) Lie algebra in terms of the generators of Lorentz algebra. The symbol is a blend between the Kronecker delta and the Levi-Civita symbol. It was introduced by Gerard 't Hooft. It is used in the construction of the BPST instanton. Many properties of these are tabulated in the appendix of 't Hooft's paper [1] and also in the article by Belitsky et. al [2]

[edit] See also

• instanton