2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39720It is demonstrated that measurements of the spin asymmetry for di-jet production at future polarized colliders appear to be particularly suited for a first determination of the so far unmeasured parton densities of circularly polarized photons.3 pages, LaTeX, 1 eps figure, uses sprocl style (included); Contribution to the proceedings of the workshop `DIS 2000', Liverpool, UK, April 2000High Energy Physics - Phenomenologytext