# What this mathematical symbol means?

1. Jan 28, 2009

### R A V E N

It is like equal sign with ^ on top.

#### Attached Files:

• ###### slepce.gif
File size:
747 bytes
Views:
145
2. Jan 28, 2009

### cristo

Staff Emeritus
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.

3. Jan 29, 2009

### R A V E N

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

Last edited: Jan 29, 2009
4. Feb 1, 2009

### kurnimaha

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.

5. Feb 1, 2009

### cristo

Staff Emeritus
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.

6. Feb 1, 2009

### OAQfirst

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.

Last edited: Feb 1, 2009
7. Feb 1, 2009

### OAQfirst

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

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

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

Last edited by a moderator: May 4, 2017
8. Feb 18, 2009

### R A V E N

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