deaths
Frank Harary, American mathematician and academic (born 1921)
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Frank Harary
American mathematician (1921–2005)
Frank Harary was an American mathematician, who specialized in graph theory. He was widely recognized as one of the "fathers" of modern graph theory. Harary was a master of clear exposition and, together with his many doctoral students, he standardized the terminology of graphs.…Source: Wikipedia (CC BY-SA)
January 4
Day of the year
January 4 is the fourth day of the year in the Gregorian calendar; 361 days remain until the end of the year.Source: Wikipedia (CC BY-SA)