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Saturday, February 1st, 2014 09:52 am
“Physicists do not always clearly distinguish between a matrix Lie group and its (real) Lie algebra, or between a real Lie algebra and its complexification. Thus, for example, some references in the physics literature to SU(2) actually refer to the complexified Lie algebra, sl(2;C).”

Да, действительно, какая разница -- унитарные матрицы с определителем 1, или что угодно, лишь бы след был 0.

Хорошо, что я не физик. “I'm really awfully glad I'm a Beta, because I don't work so hard.”