By "25-dimensional concatenation", what is surely meant is simply this: in order for 100 players to perform a quartet (in a balanced way), there would need to be 25 players to each part. Since "concatenate" means "link together", each part would be played by 25 players joining forces.
I don't think the result would be very musical somehow!
Baz
Why not 4 players to a part for a 25-part work?
Anyway, I think it's something to do with a weird branch of string theory where a whole country of feline characters are taken for a ride.
Tommo