Nearly 20 years after his death, the famed mathematician Paul Erdős keeps on publishing, thanks to the conjectures he left behind and the friends who strive to prove them
Ancient Egyptians were thought to have used different parts of the Eye of Horus to represent unit fractions, up to the first six powers of two Credit: Benoît Stella
Ancient Egyptians were thought to have used different parts of the Eye of Horus to represent unit fractions, up to the first six powers of 2. Credit: Benoît Stella
Writing a paper with Paul Erdős might seem like utter fantasy, considering that the prolific Hungarian mathematician died in 1996. Yet such co-authorship has happened 35 times since his death. The latest co-author is Steve Butler of Iowa State University, who becomes the 512th Erdős collaborator and has earned a coveted Erdős number of 1.