Infinity symbol in bookbinding to indicate that a book is printed on acid-free paper and will therefore be long-lasting. In modern mysticism, the infinity symbol has become identified with a variation of the ouroboros, an ancient image of a snake eating its own tail that has also come to symbolize the infinite, and the ouroboros is sometimes drawn in figure-eight form to reflect this identification, rather than in its more traditional circular form. In the works of Vladimir Nabokov, including "The Gift" and "Pale Fire", the figure-eight shape is used symbolically to refer to the Möbius strip and the infinite, for instance
Infinity on High talents so compellingly, the album is regrettably haphazard." Caroline Sullivan of "The Guardian" believed that the album was overly sullen, but noted that "They may not be happy, but they haven't forgotten to be catchy." Barry Nicholson of "NME" found the amount of guest producers to be unnecessary and disliked some of the songs, but admired the album's "infectious" nature. "Infinity on High" was a major commercial success, debuting at number one on the US "Billboard" 200 chart, with first week sales of 260,000 copies in the United States, according to Nielsen SoundScan. "Infinity" has sold 1.4 million copies in