Gerhard Ringel was born in 1919.
Gerhard Ringel died in 2008.
Gerhard Ringel has written: 'Map color theorem' -- subject(s): Map-coloring problem 'Topics in Combinatorics and Graph Theory'
Gian-Piero Ringel was born in 1976.
Julius Ringel was born on 1889-11-16.
Erwin Ringel was born on April 27, 1921, in Timisoara, Romania.
Jean-Désiré Ringel d'Illzach was born in 1849.
Pierre Ringel was born on May 1, 1922, in Montreuil-sous-Bois, Seine-Saint-Denis, France.
Gerhard Königsrainer was born in 1968.
Julius Ringel died on 1967-02-11.
Gerhard Kittel was born in 1888.
Gerhard Friedrich was born on 1917-09-16.
Gerhard Piske was born in 1954.