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Questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances. Such a question should typically be in Community Wiki mode (CW); after asking, please, flag for moderators attention requesting the question to be made CW.
62
votes
LaTeX tricks that save time in typesetting
In case you want to use tikzcd to draw diagrams this tikzcd editor saves lot of time.
\begin{tikzcd} & & A \arrow[rr] \arrow[lld] \arrow[dd] & & V \arrow[d] & \arrow[dd] \\
& V \arrow[dd] \arrow …
1
vote
Examples of great mathematical writing
I want to mention two papers (related).
The very famous Complex analytic connections in fibre bundles by Michael Atiyah.
The not so famous The Atiyah bundle and connections on a principal bundle by …
3
votes
0
answers
468
views
Applications of Ambrose-Singer theorem on holonomy
I am planning to introduce to a group of Graduate students the notion of connections on Principal bundle, curvature of connection, Holonomy. I want to conclude with the statement of Ambrose-Singer t …
9
votes
Old books you would like to have reprinted with high-quality typesetting
Curvature and Characteristic classes by J. L. Dupont.
18
votes
Old books you would like to have reprinted with high-quality typesetting
A general theory of Fibre spaces with Structure sheaf by Alexandre Grothendieck
8
votes
2
answers
3k
views
What does reduction of structure group of principal bundle say?
$\DeclareMathOperator\GL{GL}\DeclareMathOperator\SO{SO}$Let $G$ be a Lie group and $\pi:P\rightarrow M$ be a principal $G$ bundle.
The notion of reduction of structure group is standard but I will rec …
2
votes
2
answers
214
views
Measuring failure of a setup to preserve some structure giving interesting notions
I am looking for some examples of failure of some structures giving interesting notions. For example, we have the following situation:
Let $P(M,G)$ be a principal bundle. Let $\Gamma\subseteq TP$ be …
5
votes
5
answers
2k
views
Terminology introduced in recent years with more than one meaning
Suppose a term(inology) is recently (in last 20 years) introduced in research mathematics.
It might happen that some one who wish to use it, in the same area of research, for different purposes or se …
5
votes
Terminology introduced in recent years with more than one meaning
The word “topological stack” has at least three usages:
A stack $\mathcal{D}\rightarrow \text{Top}$ is said to be a topological stack if there is a a morphism of stacks $p: \underline{M}\rightarrow …
79
votes
9
answers
21k
views
Results that are widely accepted but no proof has appeared
The background of this question is the talk given by Kevin Buzzard.
I could not find the slides of that talk. The slides of another talk given by Kevin Buzzard along the same theme are available here. …