Systematics of Slepton Production in e+e- and e-e- Collisions

I present the basic formulae for slepton production in e+e- and e-e- collisions in an especially simple form, using a helicity basis. This parametrization introduces the useful `neutralino functions’ to connect the neutralino eigenstates to observable cross sections. [to appear in the proceedings of the 2nd International Workshop on Electron-Electron Interactions at TeV Energies (e-e-97), Santa Cruz, CA]