∴:

∴? Therefore, the symbol "∴" is often used in mathematical problems, usually in the process of solving problems. Ryan was the first person to express reason with symbols. In an algebra book 1659, he used two symbols to express rationality: ∴ and:, of which ∴ was used more.

∵:

∫ means because, in the Handbook of Popular Mathematics published in Britain 1805, ∫ means because for the first time, but it didn't catch on. By 1827, Euclid's Elements of Geometry published by Cambridge University was represented by \ and ∴ respectively. Therefore, this usage has become more and more popular and has been used ever since.

Extended data:

The meaning of other mathematical symbols:

1, greater than or equal to greater than or equal to.

1, ≤≤≤

3. The ≡ constant is equal to or congruent.

4.ππ pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi pi

5、e？ Natural constant? The natural constant is about 2.7 1828 18285.

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