Talk:Dini derivative

Assignment Equality (triangle symbol)
This is the first I've ever seen the triangle symbol. I am a professional mathematician. Maybe it is sufficiently uncommon that the article should say what it is. 147.129.213.113 (talk) 16:39, 24 February 2016 (UTC)
 * I agree. I'm deleting them. Staecker (talk) 19:29, 2 December 2019 (UTC)