Deletion of Sixth power

Comment: to Exponentiation, no indication of coverage that isn't .  (side comment: Zenzizenzizenzic, a very different article, may be interesting to readers here
Stance: merge
Cited policy: Wikipedia:Run-of-the-mill (WP:MILL)

Comment: MathSciNet finds 20 papers with "sixth powers" in their titles (all of which look relevant) and 16 more with "sixth power" instead (many of which also look relevant). Easy pass of 
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG)