We use the expression Integral geometry in the sense given it by Blaschke in “Vorlesungen über Integrtüçeomelrie”. In a previous paper (“Integral formulas in Croflon style on the sphere and... | Several integral formulas referring to convex plane curves, notable for their great generality, were obtained by W. Crofton in 1868 and successive years from the theory of geometrical probab... | For two curves in a plane or two surfaces in ordinary space various projective invariants have been given by different authors. Obviously each projectiva invariant is also an affine invarian... | Una nueva demostración de la propiedad isoperimétrica del círculo, en el plano y sobre la esfera, deducida de una fórmula de Crofton de la teoría de Probabilidades geométricas y de otra fórm... | Curvas D de una superficie son las curvas, estudiadas por Darboux, que en cada uno de sus
puntos la esfera oscilatriz es tangente a la superficie. En este trabajo se establece que, bajo c... |
