Towards the Mathematics of Quantum Field Theory by Frédéric Paugam

Author:Frédéric Paugam
Language: eng
Format: epub, pdf
Publisher: Springer International Publishing, Cham

2.A morphism f:X→Y of stacks is (−1)-representable if for any representable stack Z and any morphism Z→Y, the fiber product Y× Z X is geometric.

3.A morphism f:X→Y is in (−1)- if it is (−1)-representable and the pullback of f along a point Z→Y with values in a representable stack is a morphism in .

4.An n-atlas on a stack X is a family of morphisms {U i →X} i∈I such that: (a)each U i is representable;

(b)each morphism U i →X is in (n−1)-;

(c)the total morphism

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