deleted-tag The tags mittag-leffler-function, surface-area, jordan-content are gone: math.stackexchange.com/posts/3722421/revisions math.stackexchange.com/posts/3724346/revisions math.stackexchange.com/posts/3725480/revisions

new-tag deleted-tag The tag unitary-operator was created, but almost immediately removed: math.stackexchange.com/posts/3726947/revisions

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tag-synonyms The synonym lmi $\to$ linear-matrix-inequality was proposed in May. math.stackexchange.com/tags/linear-matrix-inequality/synonyms There aren't many user who can vote for/against that synonym, i.e., with the score 5 or higher in the tag.