france started driving on the right on 8 november 1968.
when did france start driving on the right?
8 november 1968
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section::::overview.





























stacks are the underlying structure of algebraic stacks (also called artin stacks) and deligne–mumford stacks, which generalize schemes and algebraic spaces and which are particularly useful in studying moduli spaces. there are inclusions: schemes ⊆ algebraic spaces ⊆ deligne–mumford stacks ⊆ algebraic stacks (artin stacks) ⊆ stacks.





























section::::motivation and history.





























the concept of stacks has its origin in the definition of effective descent data in .
stack (mathematics)