Some Notes on Dirac operators on the {rm S}³ and {rm S}² spheres

We describe both the Hodge - de Rham and the spin manifold Dirac operator on the spheres ${\rm S}^3$ and ${\rm S}^2$, following the formalism introduced by K\"ahler, and exhibit a complete spectral resolution for them in terms of suitably globally defined eigenspinors.