A. Garcia et H. Stichtenoth, ASYMPTOTICALLY GOOD TOWERS OF FUNCTION-FIELDS OVER FINITE-FIELDS, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 322(11), 1996, pp. 1067-1070
For a function field F over a finite field F-q, let N (F) (resp. g (F)
) denote the number of rational places (resp. the genus) of F. We give
several explicit examples of towers of function fields F-1 subset of
or equal to F-2 subset of or equal to ... over F-q, such that lim(i-->
infinity) N (F-i)/g(F-i) > 0.