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
Number 1 to Infinity clarity, and agility with ease". "#1 to Infinity" debuted at number 29 on the US "Billboard" 200 chart on June 6, 2015, selling 15,000 copies in its first week, marking the ninth highest debut of the week and the tentieth best-selling album of the week. It became her twentieth album to make the chart. Her eponymous album had debuted at number 80 twenty-five years prior in 1990 and later became her first of six number-one albums in 1991. "#1 to Infinity" peaked at number 2 on the Top R&B/Hip-Hop Albums chart<ref name="Top R&B/Hip-Hop Albums"></ref><ref name="Top R&B/Hip-Hop Albums Chart History"></ref> and