In mathematical representation theory, two representations of a group on topological vector spaces are called Naimark equivalent (named after Mark Naimark) if there is a closed bijective linear map between dense subspaces preserving the group action.
The word "math" is unrelated to the word "mathematical".
A: No

The Angel and the Soldier Boy is the 13th album by Irish folk group Clannad, released in 1989. It is the soundtrack to the animated movie of the same name and contains both the music to the movie and the narration of the story by Tom Conti. The animation is based on the award-winning children's picture book by Peter Collington.
Clannad is a Scottish folk group that has released at least 13 albums.
A: No

102 Squadron ""Panchos"" ("Esquadra 102") was an elementary flight training squadron of the Portuguese Air Force disbanded in 1992. Formed in 1962, the squadron administered air force training and performed at air shows throughout Portugal. Between 1963 and its disbandment in 1992, the squadron lost nine pilots.
102 Squadron performed shows
A:
Yes