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center o bass
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The Maurer-Cartan one-form ##\Theta = g^{-1} dg## is though of as a lie algebra valued form.
It arises in connection with Yang-Mill's theory where the gauge potential transforms as
$$A \mapsto g Ag^{-1} - g^{-1} dg.$$
However, one also defines for lie-algebra valued differential forms ##\alpha, \beta \in \Omega_p(M,\mathfrak g)##, the Lie bracket
$$[\alpha, \beta] = [\xi_k, \xi_l] \alpha^k \wedge \beta^l.$$
The question then arise, what does one mean by the lie-bracket when ##g^{-1} dg## is involved?
For example, how would one compute
$$[g^{-1} dg, g\alpha g^{-1}],$$
for a lie algebra valued form ##\alpha##?
It arises in connection with Yang-Mill's theory where the gauge potential transforms as
$$A \mapsto g Ag^{-1} - g^{-1} dg.$$
However, one also defines for lie-algebra valued differential forms ##\alpha, \beta \in \Omega_p(M,\mathfrak g)##, the Lie bracket
$$[\alpha, \beta] = [\xi_k, \xi_l] \alpha^k \wedge \beta^l.$$
The question then arise, what does one mean by the lie-bracket when ##g^{-1} dg## is involved?
For example, how would one compute
$$[g^{-1} dg, g\alpha g^{-1}],$$
for a lie algebra valued form ##\alpha##?