# What this mathematical symbol means?

• R A V E N
In summary, This symbol, which looks like an equal sign with a caret on top, is often used to indicate correspondence or equivalence between two values or measurements. In mathematics, it is commonly used to represent a scale or ratio between two quantities, such as in map scales. It can also be used to show that two values are equivalent or correspond to each other, such as in the context of problem-solving. It is also known as the "Estimates" symbol and can be found under the font set OpenSymbol. It is also represented by the Lucida Sans Unicode font.
R A V E N

It is like equal sign with ^ on top.

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In what context is this used? I can't think of a standard meaning for this.. perhaps they mean "definition." It would be easier to tell if you could quote an equation, say, which uses this.

For example,it is used between $$0.000001\;m^3$$ and $$1\;cm^3$$.

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It probably means that two things are correspondent. For example, a map could be drawn to a scale, let's say 1 : 10 000, and so one could say that 1 unit of measurement on the map corresponds to 10 000 of that same unit in reality. I've seen that notation been used like this:

1 cm2 $$\widehat{=}$$ 10 000 m2

which means that an area of 1 cm2 measured on the map corresponds to 10 000 m2 in reality.

R A V E N said:
For example,it is used between $$0.000001\;m^3$$ and $$1\;cm^3$$.

In what context it this? The two are equivalent, so it probably just means that. But, unless you provide the specific context (a question, say) then it will be difficult to guess.

Character Map shows one as U+2259 under the font set OpenSymbol. The character name is "Estimates"

http://www.fileformat.info/info/unicode/char/2259/index.htm

It can be represented with Lucida Sans Unicode font here. It may look different when you enter it in a text box, but should display fine once posted.

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Found a wiki on it. When you copy and paste the estimates symbol, it redirects to "correspondence."

http://en.wikipedia.org/wiki/Correspondence_(mathematics )

Whether this has anything to do with the original problem, I dunno.

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cristo said:
In what context it this? The two are equivalent, so it probably just means that. But, unless you provide the specific context (a question, say) then it will be difficult to guess.

When some problem is solved and the "first" result is given at the end followed by this symbol and "second" result.

## 1. What does the symbol "∑" mean in mathematics?

The symbol "∑" represents the summation or addition of a series of numbers or terms. It is commonly used in algebra and calculus to indicate the total of a set of values or the sum of a sequence of numbers.

## 2. How is the symbol "≠" used in mathematics?

The symbol "≠" is read as "not equal to" and is used to show that two quantities are unequal or have different values. It is the mathematical equivalent of the "!=" symbol in computer programming.

## 3. What is the meaning of the symbol "√" in mathematical equations?

The symbol "√" is called the radical symbol and is used to indicate the square root of a number. It is the inverse operation of squaring a number and is denoted as "√x" or "x^(1/2)".

## 4. How is the symbol "π" used in mathematics?

The symbol "π" is the Greek letter pi and is used to represent the mathematical constant which approximates to 3.14159. It is commonly used in geometry, trigonometry, and calculus to represent the ratio of a circle's circumference to its diameter.

## 5. What does the symbol "∞" mean in mathematics?

The symbol "∞" represents infinity, which is a concept used in mathematics to indicate something without an end or without limits. It is commonly used in calculus to represent the concept of limits and in algebra to represent an infinitely large value.

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