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5:17 AM
A new tag . I guess it should be either removed or made synonym of .
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Q: Classifying spaces [related to Eilenberg–MacLane] for explicit group examples

wonderichI am interested in knowing the generalized classifying spaces (related to Eilenberg–MacLane space $K(G,n)$ when $G$ is discrete) for explicit group examples ($G=$ the entries given at the top row) given below. Can someone fill in the Table? $$\begin{array}{c|c|c|c|c|c|c|} G & \mathbb{Z}^n & \m...

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Q: Classifying spaces for explicit group examples 2

wonderichI am interested in knowing the classifying spaces $BG$ (related to Eilenberg–MacLane space $K(G,n)$ when $G$ is discrete) for explicit group examples ($G=$ the entries given at the top row) given below. Can someone fill in the Table? $$\begin{array}{|c|c|c|c|c|} \hline G & U(n) & SU(n) & O(n) &...

Another new tag was introduced by Shaun:
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Q: What are $holors$ and why are they a generalization of tensors concept?

user332153I take a look about Theory of Holors: A Generalization of Tensors but I never heard this term "holor" I thought that the generalization of the tensors were the supertensors or hypertensor like that A vector or tensor whose components are themselves tensors is very hard to find a good genera...

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Q: Find all integers $x$ and $y$ for which $\frac{x^2}{x-1}+\frac{y^2}{y-1}$ is an integer.

marty cohenFind all integers $x$ and $y$ (not just positive) for which $\frac{x^2}{x-1}+\frac{y^2}{y-1}$ is an integer. This is a generalization of Find integers $a$ in $[1,2014]$ to get solutions in integers of $x+y=a, \frac{x^2}{x-1}+\frac{y^2}{y-1}=4$ Here is what I have come up with: The only solut...

The tag (generalization) was created and removed in the past: data.stackexchange.com/math/query/542457/…
In 2012 by FUZxxl, in 2016 by Najib Idrissi and in 2018 by Marty Cohen.
Sorry, my bad, in the one in 2016 Najib Idreissi removed the tag, it ws created by Julian Rachman.
Should this tag be removed straight away or should it be discussed on meta. It seems that it is a recurring issue.
 
 
2 hours later…
7:42 AM
I see that two new tag synonyms have been proposed by GNU Supporter.
One of them is $\to$ . Related post on meta can be found in Tag management 2017.
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A: Tag management 2017

Martin SleziakThe tag elementary-probability has been created recently. The tag-info is currently empty. Do we want/need this tag? I'd say that past discussions on meta indicate that tags are not based on level/difficulty of the question, but on the content. For example: Should we require a tag that which spe...

The other one is $\to$ . Relevant post on meta: Expectation means average?
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Q: Expectation means average?

GNU SupporterWe have three ambiguous tags average, expectation and means. They are often used for probability and statistics problems. The tag expected-value has been synonymized with probability. The current tag excerpts and info for these three tags are not clear enough. The average tag includes arithme...

 
 
1 hour later…
9:13 AM
I have removed both generalization and general topological-spaces. Just way too general to be useful.
 

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