This work is also famed for the first use of the symbol ∞ which was chosen by Wallis to represent a curve which one could traced out infinitely many times.
Ito ay gumagana rin sikat para sa unang paggamit ng mga simbolo ∞ na kung saan ay pinili ng Wallis na kumakatawan sa isang kilo na kung saan ang isa ay lumabas traced walang hanggan maraming beses.