Swedish postage stamps with Reutersvard's impossible figures that was printed at
1982.
Postage stamps that was devoted to mathematical congress in Insbrook in 1981.
This postage stamp is devoted to anniversary of university Technion in Israel. Image of the stamp was found at http://sio.midco.net/danstopicalstamps/impossible.htm
Postage stamps that are ship from shop of the website www.sandlotscience.com.
You can find more images of postage stamps that was devoted to
mathematicians and mathematical events at
