Function: abs(gradient[2](numbers('xry') if numbers("xxr") > numbers('xry') else minus(numbers('xry'), numbers("xxr")))) if minus(numbers('xry'), numbers("xxr")) > gradient[2](numbers("xxr") if minus(numbers('xry'), numbers("xxr")) > numbers('xry') else numbers('xry')) else numbers('xry') if numbers('xry') > numbers("xxr") else minus(numbers('xry'), numbers("xxr"))
