For example, a number does not exceed 8, which can be 8 or 7, but not 9.
Less than or equal to is a way of judging, which will appear in various mathematics or programming. In the proposition, less than or equal to is less than or equal to, as long as one condition is met. Less than or equal to is sometimes called "not greater than".
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Mathematicians have racked their brains to find a set of symbols of "greater than" or "less than".
1629, the French mathematician Rizal used the symbol "ff" to indicate "greater than" and the symbol "less than" in his algebra course. For example, a greater than b is la beled as "AffB" and a less than b is labeled as "ab".
163 1 year, the British mathematician harriot first created the symbol ">", which means "greater than".
1634, the French mathematician Egan quoted very inconvenient symbols to express inequalities in his Mathematics Course, such as: a>b is represented by the symbol "a3|2b"; B<a is represented by the symbol "b2|3a". Because these inequalities are very complicated to write, they are quickly eliminated.
According to a letter written by Goldbach to Euler in June of 1734+0, the common symbols of "≧" and "≦" are a Frenchman P? Cloth (1698- 1758) was first adopted, and then it gradually became popular.
Poincare and Borel introduced the symbols "<< (far less than) and" > >; " (much greater than), it was quickly accepted by the mathematical community and is still in use today.