EntityQ483270· pop 5· linked from 82 articlesanabelian geometrySign in to savearea of mathematics, which describes the way in which the algebraic fundamental group of an arithmetic variety can be used to reconstruct the varietyConnectionsétale fundamental groupEntitynumberEntityarithmeticEntityInternational Standard Book NumberEntitynatural numberEntityprime numberEntitynumber theoryEntityrational numberEntitydigital object identifierEntityirrational numberEntitycomposite numberEntityfieldEntityJSTOROrganizationtranscendental numberEntityhyperbolic functionEntityalgebraic geometryEntityalgebraic numberEntityAlexander GrothendieckEntityQ118398Entitymodular arithmeticEntityCategoriesArithmetic geometryNoncommutative geometry