The tag degeneracy was created by user122424, then removed by Alex Francisco. The tag-creator also added a tag-excerpt.

> In simplical categorical homotopy theory, a degeneracy is a map increasing the dimension.

The words "degeneracy" and "degenerate" rather frequently used for various meanings, so if a tag for this topic is needed, it would probably be better to have a more specific tag-name.

Another tag which was recently created and then removed is discrete-random-variable.

@MartinSleziak The tag geometric-distribution was also removed from that post, it should be gone in 24 hours unless somebody uses it again.