Method isNaN

src/jvm/clojure/lang/Numbers.java:4039–4042

(Object x)

static boolean isNaN(Object x){
	return (x instanceof Double) && ((Double)x).isNaN()
		|| (x instanceof Float) && ((Float)x).isNaN();
}

static public double max(double x, double y){
	return Math.max(x, y);