Relational symbol is a special symbol to express a certain relationship between numbers and formulas, and less than sign is an inequality operation symbol in mathematics. Harriet, a British mathematician, first used the symbol.

Extended data:

Common relational symbols:

1, equal sign: a symbol indicating that two numbers are the same. Write it down as "=" and read it as "equal to". For example, 12÷6=2, which means that 12 divided by 6 (or 6 divided by 12) equals 2.

2. Unequal sign: indicates two symbols with different numbers. Write it down as "≦" and read it as "not equal to". For example, 52≠5×2 means that the square of 5 is not equal to the product of 5 times 2.

3. Greater than sign: a sign indicating that the quantity on the left is greater than the quantity on the right. Write it down as ">" and read it as "greater than". Such as 9 >; 8 means that 9 is greater than 8.

4. Less than sign: a sign indicating that the quantity on the left is less than the quantity on the right. Write it down as "

5. Operation symbol: indicates the symbol belonging to an operation. For example: plus sign "+",minus sign "one", multiplication sign "×" and division sign "∫".

6. Relationship between elements and sets: Does the relationship between elements and sets belong to (∈) or not (? ) relationship. Does the relationship between a set and a set contain () or (? ,? )。

Baidu encyclopedia relational symbol