%0 Book Section %A Byrnes, Christopher I. %T On certain problems of arithmetic arising in the realization of linear systems with symmetries %B Analyse des systèmes %A Collectif %S Astérisque %D 1980 %P 57-65 %N 75-76 %I Société mathématique de France %U http://archive.numdam.org/item/AST_1980__75-76__57_0/ %G en %F AST_1980__75-76__57_0