10:05 AM
@MartinSleziak Is there actually any difference between the newly created tag and the tag which has existed already for some time?
The tag-excerpt says:
> A linear group or matrix group is a group $G$ whose elements are invertible $n \times n$ matrices over a field $F$.
The tag-wiki says:
As examples of linear groups, we have the general linear group, of all invertible $n\times n$ matrices, the special linear group, of all $n\times n$ matrices whose determinant is $1$, or the group of all invertible $n\times n$ upper triangular matrices.
In mathematics, a matrix group is a group G consisting of invertible matrices over a specified field K, with the operation of matrix multiplication, and a linear group is an abstract group that is isomorphic to a matrix group over a field K, in other words, admitting a faithful, finite-dimensional representation over K. Any finite group is linear, because it can be realized by permutation matrices using Cayley's theorem. Among infinite groups, linear groups form an interesting and tractable class. Examples of groups that are not linear include groups which are "too big" (for example, the group...
According to Wikipedia:
> In mathematics, a matrix group is a group G consisting of invertible matrices over a specified field K, with the operation of matrix multiplication, and a linear group is an abstract group that is isomorphic to a matrix group over a field K, in other words, admitting a faithful, finite-dimensional representation over K.
However, I don't think that such distinction warrants a separate tag. Perhaps creating tag synonym would be reasonable.
I have posted a suggestion to create a synonym between and on meta.

10:36 AM
0

Proposal: I suggest to create a synonym between matrix-groups and linear-groups. (I am not really sure which direction is better.) The tag linear-groups has been on the site for some time, you can see that the tag-excerpt and the tag-wiki have been created in 2013. The tag matrix-group has been ...

7 hours later…
5:35 PM
@MartinSleziak I see that is not shown in the revision history - so it was most likely removed by the SE software. (A tag with a single occurrence, no tag wiki, at least 6 months old.)