Leonard Roth
Encyclopedia
Leonard Roth was a mathematician working in the Italian school of algebraic geometry
. He introduced an example of a unirational variety that was not rational (though his proof that it was not rational was incomplete).
Italian school of algebraic geometry
In relation with the history of mathematics, the Italian school of algebraic geometry refers to the work over half a century or more done internationally in birational geometry, particularly on algebraic surfaces. There were in the region of 30 to 40 leading mathematicians who made major...
. He introduced an example of a unirational variety that was not rational (though his proof that it was not rational was incomplete).