The Transition Function of $G_2$ over $S^6$

Abstract

We obtain explicit formulas for the trivialization functions of the $\mathrm{SU}(3)$ principal bundle $G_2\to S^6$ over two affine charts. We also calculate the explicit transition function of this fibration over the equator of the six-sphere. In this way we obtain a new proof of the known fact that this fibration corresponds to a generator of ${\pi }_5(\mathrm{SU}(3))$.