Function: square(gradient[1](numbers("per") if min(numbers("per"), numbers("yxx")) > min(numbers("per"), numbers("yxx")) if numbers("yxx") > numbers("per") else numbers("per") if numbers("yxx") > min(numbers("per"), numbers("yxx")) else numbers('xry') else numbers("per") if numbers('xry') > numbers("yxx") else min(numbers("per"), numbers("yxx"))))
