MIN, MINA, MINX – DAX Guide

MIN: Returns the smallest value in a column, or the smaller value between two scalar expressions.
https://dax.guide/min/

MINA: Returns the smallest value in a column.
https://dax.guide/mina/

MINX: Returns the smallest value that results from evaluating an expression for each row of a table. Strings are compared according to alphabetical order.
https://dax.guide/minx/