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Diff — Lattice (group)

Revision #3505 → #4029 · back to history

addedClosure under addition/subtraction implies subgroupbd830d02cb52
modifiedComplex representation and modular group action7be67ca874e6
FieldFrom #3505To #4029
mathlib.declModularGroupModularGroup.fd
noteSL(2,ℤ) and its action on the upper half-plane are formalized, but no statement identifies its orbits with equivalence classes of 2D lattices.SL(2,ℤ) and its action on the upper half-plane are formalized in the ModularGroup namespace, but no statement identifies its orbits with equivalence classes of 2D lattices.
addedp-adic integers as an R-lattice example8e5dc14575dc