# Questions tagged [sites]

For question related to the mathematical notion of site, which among others generalizes the notion of topological space. For questions on internet-sites use online-resources, but note that these question need to be very specific to research-level mathematics to be on-topic.

**5**

**0**answers

### Refinement of hypercovers by ordinary covers

**4**

**0**answers

### Does Fpqc sheaf over category of rings imply representability

**10**

**3**answers

### Resources for topos theory

**2**

**0**answers

### Small sheaves on big sites

**1**

**0**answers

### Confusion in understanding the notion of $G$ Principal bundle where $G$ is a geometric group over a site

**1**

**0**answers

### Čech-Alexander complex in computing (crystalline/prismatic) cohomology

**7**

**0**answers

### What is a morphism of ∞-sites?

**14**

**1**answer

### Are there (enough) injectives in condensed abelian groups?

**3**

**1**answer

### What to call a morphism of sites inducing an equivalence on categories of sheaves?

**14**

**1**answer

### Has this “backwards” perspective on toposes been studied?

**1**

**0**answers

### “Covering-flat” part in definition of morphism of sites

**4**

**1**answer

### How to construct cup-product in a general site?

**0**

**0**answers

### Grothendieck topology on a scheme equivalent to the circle

**10**

**1**answer

### Points of the big Zariski site

**2**

**0**answers

### Pullback of a constant sheaf over arbitrary sites

**6**

**1**answer

### Equivalence of the definitions of a sheaf in SGA4 and in “Categories and Sheaves”

**10**

**0**answers

### Differential Forms in Infinite Dimensions

**4**

**0**answers

### Is the restriction of sheaves from the big to small etale sites an equivalence?

**6**

**0**answers

### Dense (∞,1)-subsites

**4**

**1**answer

### Stacks for the extensive topology?

**1**

**0**answers

### Morphism of 2-sites

**5**

**0**answers

### Examples of nonstable ∞-categories in which sifted colimits commute with finite limits

**5**

**1**answer

### Categorification of covering morphisms

**1**

**0**answers

### $\mathbb E$-descent maps in topological spaces in terms of different sites?

**0**

**1**answer

### A confusion about covering flatness

**10**

**0**answers

### Making the conceptual leap from locales to Grothendieck topologies?

**3**

**2**answers

### Morphism on schemes induced by continuous morphism of sites

**8**

**1**answer

### Which dense inclusions of sites are ∞-dense?

**3**

**2**answers

### 1st cech cohomology groups on ringed sites

**17**

**1**answer

### Points in sites (etale, fppf, … )

**22**

**2**answers