Original: Paul ErdÅ 's (occasionally spelled Erdos or ErdÃ s;,; 26 March 1913 â "20 September 1996) was a Hungarian mathematician.
Simplified: Paul ErdÅ 's, also PÃ l ErdÅ' s, in English Paul Erdos or Paul ErdÃ s (March 26, 1913 â "September 20, 1996), was a famous Hungarian-born mathematician.