These numbers were called Fubini numbers by Louis Comtet .
They count the number of different ways to rearrange the ordering of sums or integrals in Fubini 's theorem , which in turn is named after Guido Fubini .
These numbers were called Fubini numbers by Louis Comtet , because they count the number of different ways to rearrange the ordering of sums or integrals in Fubini 's theorem , which in turn is named after Guido Fubini .