Below is a table with the main mathematical symbols and signs that are used in algebra grade 7 and above.
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| Name | Meaning / description | Example | |||||||||||||||||||||
| unknown variable to be found | ≡ | equivalence | logical equivalence or equivalent | ~ | approximately equal to | approximate equality (weak) | 15 to 14 | ||||||||||||||||
| ≈ | approximately equal to | approximate equality | α | proportionally | proportionality of values | ∞ | infinity | lack of boundaries or quantitative measure | |||||||||||||||
| “ | much less | A is much smaller than B | » | a lot more | A is much bigger than B | () | round brackets | the expression in parentheses is considered first | [] | square brackets | the expression in parentheses is considered first | {} | braces | various applications | |||||||||
| bottom square brackets | upper square brackets | exclamation mark | factorial | log | logarithm | single vertical bar | absolute value (modulus) | function composition | (a, b) | open interval | [a, b] | closed interval | Δ | delta | change/difference | Δ | discriminant | Σ | sigma | the sum of all values in the selected range | ∑∑ | sigma | double sigma |
| capital letter «pi» | product of factors in the selected range | «> | |||||||||||||||||||||
| Euler constant – Mascheroni |  «> | ||||||||||||||||||||||
| golden ratio | golden ratio constant | ||||||||||||||||||||||
| Pi” |  Leave a commentОтменить ответ |