Biography
Lluis Antoni Santaló Sors, Spanish-born Argentine geometer (Girona, Catalunya 09 October 1911 – Buenos Aires 22 November 2001)
Regarded internationally as founder of modern integral geometry and one of greatest geometers of the 20th century
Authored over 150 papers
Authored 25 books between them Vectores y Tensores (1961) and Integral Geometry and Geometric Probabilities (1976)
Invited Lecturer, International Congress of Mathematicians (1950)
ACHIEVEMENTS
With Chern regarded as founder of hyperbolic integral geometry
Introduced kinetic density for sets of geodesies on two-dimensional surfaces
Introduced affine unimodular invariant (1958)
Obtained integral formulas for a two-dimensional Riemannian space of negative constant curvature
Laid the mathematical foundations for the creation of stereology
Introduced convex sets by horospheres
Proposed a definition for absolute total curvatures of a Euclidean space closed subset
Solved the problem of one-dimensional foliations in a Riemann variety
CONTRIBUTIONS
A new affine invariant plane and solid convex bodies. Math Notae 16:78-91, 1958
Some integral formulas and a definition of q-dimensional area for a set of points. Rev. Univ. Nac. Tucumán 7:271-82, 1950
An affine invariant for convex bodies in n-dimensional space. Portugaliae Math. 8:155-61, 1949
An affine invariant for closed convex plane curves. Math. Notae 8:103-11, 1948
Some integral formulas referring to convex bodies. Rev. Un. Mat. Arg. 12:78-87, 1946
A theorem on conformal mapping. Math. Notae 5:29-40, 1945
An integral formula concerning convex figures. Rev. Uni. Mat. Argentina 8:165-91, 1942
A theorem and an inequality referring to rectificable curves. Amer. J. Math. 63:635-44, 1941
A theorem on sets of parallelepipeds with parallel edges. Publ. Inst. Mat. Univ. Nac. Litoral 2:49-60, 1940
EPONYMY
Blaschke-Santaló inequality
Blaschke-Chern-Santaló theorem
Santaló bodies
Santaló conjecture on convex sets
Santaló K point
Santaló point of a function
Santaló formula
LINKS
http://www.fceia.unr.edu.ar/secyt/apuntes/Santalo/Santalo.htm