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Mathematical symbols in postgraduate entrance examination
First of all, it is possible in mathematics, which is internationally accepted at present.

Ryan was the first person to express "there" with symbols. In an algebra book 1659, he used two symbols "∴" and "⊙" to mean "so", among which "∴" was used more. The English version of the book 1668 also uses these two symbols to mean "so", but "∵" is used more. Jones uses ∴ in 1706 to mean "so". By the middle of18th century, "∵" was used to mean "so", at least as much as "∴". "

/kloc-at the beginning of the 0/8th century, no one used ∵ to mean "because". It was not until 1805 that \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \ u \\ By 1827, Euclid's Elements of Geometry published by Cambridge University used ⊙ for "because" and ∴ for "so" respectively. This usage has become more and more popular and has been used ever since.