I'm sure this is very easy, but I'm rusty on groff fonts, and I'm not sure how to do it. I want to add the triangle symbol △ (U25b3) as an operator to eqn. So, this is my document:
.EQ delim $$ define triangle 'type "operator" △' .EN .LP In $triangle ABC$ there are three sides. When I run this through groff -ps -e -ms -k I get the message: warning: can't find special character 'u25B3' which I was kind of expecting. But is there any easy way to point grops towards the definition of U25B3? Robert. Robert Goulding Sent from my Google Pixel 4
