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
Flag of the Soviet Union Kremlin which bore the single-side official design. For vertical display, the flag was made with the distinct difference of having the hammer and sickle rotated 90 degrees in order to compensate for the change in dimensions. This was common in official practice, however the common flag owner would simply hang the standard design of the flag by the hoist. During the establishment of the Russian SFSR, Vladimir Lenin and his comrades had considered the inclusion of a sword symbol in addition to the hammer and sickle as part of the state seal on which the flag was eventually based. The