La Classification Mathématique par matières 2000 Mathematics subject Classification 2000 Query : CC = 11G35 11-XX Number theory 11G35 Varieties over global fields [See also 14G25] 14-XX Algebraic geometry 14J20 Arithmetic ground fields [See also 11Dxx, 11G25, 11G35, 14Gxx] Keyword : Back to the Mathematics Subject Classification (version 2000)