Resumen de On Comparison, Equivalence and Addition of Magnitudes

Paulo A.S. Veloso, Abel Lassalle Casanave, Eduardo N. Giovannini

• A theory of magnitudes involves criteria for their comparison, equivalence and addition. We examine these aspects from an abstract viewpoint, stressing independence and definability. These considerations are triggered by the so-called De Zolt’s principle in the theory of equivalence of plane polygons.