To write uppercase Alpha you need a modern version of latex (ie xelatex or lualatex) and to include the unicode-math package https://tex.stackexchange.com/ques

To write uppercase Alpha you need a modern version of latex (ie xelatex or lualatex) and to include the unicode-math package https://tex.stackexchange.com/questions/485593/how-to-write-capital-alpha https://tex.stackexchange.com/questions/485593/how-to-write-...