code: public static INDArray max(INDArray first, INDArray second, boolean dup) {
          INDArray result = first;
          if (dup) {
              result = first.ulike();
          }
          return exec(new OldMax(first, second, result));
      }
docs: Element wise maximum function between 2 INDArrays
  
  @param first
  @param second
  @param dup
  @return