sentences:  Nick Trefethen
  
  Lloyd Nicholas Trefethen  (born 30 August 1955) is a British mathematician, professor of numerical analysis and head of the Numerical Analysis Group at the Mathematical Institute, University of Oxford.Trefethen was born 30 August 1955 in Boston, Massachusetts, the son of mechanical engineer Lloyd M. Trefethen and codebreaker, poet, and English professor Florence Newman Trefethen.