Mathematics On Stamps

Ireland
EUROPA - Inventions
May 4, 1983
Set of two, one stamp features William Rowan Hamilton (1805 - 1865), the greatest Irish mathematician and one of the founders of abstract algebra. The design shows his defining relations for the division ring of quaternions.

Great Britain
Scientific Achievements
March 5, 1991
Charles Babbage (1791 – 1871) was an English polymath. Babbage is credited with inventing the first mechanical computer that eventually led to more complex electronic designs.

United States
STEM Education
April 6, 2018
Set of four, one stamp depicts mathematics education.

Slovenia
Prominent Slovenians - Ivan Vidav
January 26, 2018
Ivan Vidav (1918 – 2015) was a Slovenian mathematician with main research interest in differential equations, functional analysis and algebra. He was responsible for all major reforms in mathematics education in Slovenia.

Here is an image of a stamp featuring a portrait of Nikolai Ivanovich Lobachevsky (1792-1856), a Russian mathematician and geometer known primarily for his work on hyperbolic geometry, designed by Vasili Vasilievich Zavialov (1906-1972), printed by lithography, and issued by Russia (USSR) on June 4, 1956 to commemorate the centenary of the mathematician's death, Scott No. 1822, Zagorsky No. 1799, plus an image of a painted portrait (c. 1839) of Nikolai Lobachevsky by Russian artist Lev Dmitrievich Kryukov (1783-1843).

- nethryk

Ireland
World Year of Physics
March 14, 2005
William Rowan Hamilton (1805 – 1865) was an Irish mathematician who made important contributions to classical mechanics, optics, and algebra. The stamp shows his portrait and manuscript.

For a great resource on mathematics on stamps, check out "Stamping through Mathematics: An Illustrated History of Mathematics through Stamps," by Robin J. Wilson. Springer Publishing 2001 (ISBN 978-0-387-98949-5)

It contains >350 enlarged pictures of mathematics-related stamps in full color, along with interesting and informative discussions about them.

Hungary
World Expo 2010 Shanghai - Gömböc
April 30, 2010
The pane of 30 stamps depict gömböc, a convex three-dimensional homogeneous body whose existence was proven by Hungarian scientists Gábor Domokos and Péter Várkonyi.

Italy
International Women's Day
March 8, 2018
Maria Gaetana Agnesi (1718-1799) was an Italian mathematician and philosopher. She was the first woman to write a mathematics handbook and the first woman appointed as a mathematics professor at a university. The stamp shows her portrait and her work witch of Agnesi.

Serbia 2018 Famous Serbs - Mihailo Petrovi#263; (1868 - 1943)
Obtained his PhD in Mathematical Sciences in the field of differential equations.

United States
American Scientists
May 4, 2005
John von Neumann was a Hungarian-American mathematician, physicist, computer scientist, and polymath. He made major contributions to a number of fields, including mathematics, physics, economics, computing, and statistics.

Greece
Centenary of Hellenic Mathematical Society
June 19, 2018
The stamp shows geometry motifs.

Here is an image of a stamp featuring a portrait of Persian mathematician and astronomer Ghiyath al-Din Jamshid Mas'ud al-Kashi (aka al-Kashani, c. 1380-1429), printed by lithography, and issued by Iran on December 5, 1979 to commemorate 550th anniversary of the mathematician's death, Scott No. 2042.

- nethryk

Slovakia
International Mathematical Olympiad
June 7, 2019
The stamp marks the International Mathematical Olympiad (IMO), a mathematics competition for pre-college students. Contestants from 112 countries participated in the 60th IMO in 2019.

Thanks too all for keeping this post alive. I'm still checking it daily. Please keep the math stamps coming!