Jacques Touchard, Date of Birth, Place of Birth, Date of Death

Jacques Touchard

French mathematician

Date of Birth: 19-Aug-1885

Place of Birth: Sissach, canton of Basel-Landschaft, Switzerland

Date of Death: 05-Sep-1968

Profession: mathematician

Nationality: France

Zodiac Sign: Leo

Jacques Touchard (1885–1968) was a French mathematician.
In 1953, he proved that an odd perfect number must be of the form 12k + 1 or 36k + 9.
In combinatorics and probability theory, he introduced the Touchard polynomials.
He is also known for his solution to the ménage problem of counting seating arrangements in which men and women alternate and are not seated next to their spouses.