Sir --- Peter Thonemann in "Miracles of survival" (March 30) underestimates the degree to which the works of the great Greek mathematicians are remembered and honored in current mathematics. It is certainly not correct to say that they "live on anonymously". In mathematical research papers and textbooks written yesterday, you can find references to the Euclidean metric, Euclidean spaces, the Euclidean algorithm, the Pythagorean theorem, the Archimedean property, Archimedean solids, Platonic solids, Diophantine equations, the circles of Appolonius, Ptolemy's theorem, and Pappus' theorem. Ernest Davis Professor of Computer Science New York University New York, NY 10012