505-587 adamsspectralsequences algebraicgeometry algebraictopology ancient bordismandcobordismtheories categorytheory;homologicalalgebra complexcobordism($ curves cyclotomy differentialtopology ellipticcohomology ellipticcurves equations families famousproblems fibrations fieldextensions(mathematics) formalgrouplaws galoistheory general geometry hinduastronomy homologicalalgebra homologyandcohomologytheories hypercohomology ideals(algebra) india linearalgebraicgroups manifoldsandcellcomplexes mathematics numericalsolutions otherhomologytheories polynomials radicaltheory representationsofgroups rings(algebra) series spectralsequences stacksandmoduliproblems topologicalfields valuationtheory varāhamihira