The concept of infinity possessed by snakes is also related to the concept of infinity in mathematics. In fact, the real source of the shape of the mathematical infinite symbol "∞" has not been clarified. The most common saying is that the shape of the symbol comes from lemniscate in geometry, and its English word "lemon" means "ribbon knot" in Latin, so we imagined a simple circular route with a ribbon knot boundary, and then expanded it into a symbol representing infinity. Another famous explanation is that the symbol of infinity comes from the shape of Mobius belt. It is also based on the surface structure of Mobius belt, which can create infinite circulation routes. But this argument is hard to hold water, because the infinite symbol "∞" appeared earlier than the Mobius belt. Compared with the above examples, the pattern of ourobosaurus appeared earlier in history, so the relationship between ourobosaurus and infinite symbols is controversial. It is said that "∞" was originally a symbol with religion or alchemy in ancient times. In addition to snakes, the pattern named "endless knot" in Tibetan stone carvings also represents the concept of reincarnation like snakes. There are still different opinions about the source of infinite symbols because of its vague conceptual boundary and long history. As mentioned above, some people think that "∞" is an ancient symbol, while others think that "∞" is constructed by imagination on a specific object. As for the relationship between "∞" and "∞", it is still inconclusive whether the long-standing "∞" constitutes the image of "" or the "∞" inspired by "Ourath" is used by the mathematical community to express infinity.