Deletion of Schwarz function

Comment: A quick  search shows that this is pretty clearly a notable concept{{snd}}there are multiple books written about the topic, papers referencing them, etc.  However, with one sentence merely saying whom it was named for and a ref for that, it's hard to see what use it has as-is.  Probably a case of .  &ndash
Stance: comment
Cited policy: Wikipedia:Articles for deletion (WP:BEFORE||WP:HEY)