Experiments such as Georg Cantor's discovery that a single line could be divided forever and Helge von Koch's triangle — a shape that has an infinite perimeter but a finite area — resulted in the term 'monsters'.

乔治·康托尔发现一条线可以永远被分割，赫尔格·冯·科赫的三角形（周长无限，面积有限）等实验都产生了“怪物”这个词。