1. ## algebraic notation

Hi there,

I've got an exam in a couple of days and a particular math symbol is troubling me it's a plus sign within a circle.

Any Ideas???

Help would be much appreciated

Thanks,
Ally

2. Hello !
Originally Posted by ally2607
[...] a particular math symbol is troubling me it's a plus sign within a circle.

Any Ideas???
Usually $\displaystyle G \oplus H$ denotes the direct sum of $\displaystyle G$ and $\displaystyle H$. ($\displaystyle G$ and $\displaystyle H$ being two groups or two vector spaces or...)

3. yeah, I'm working with vectors and vector spaces.

Does this mean I've just to add the two vectors??

The particular problem it's in relation to is u(the plus sign in a circle symbol) v = u-v

thanks

4. So do you mean $\displaystyle u \oplus v = u - v$?

Sometimes $\displaystyle \oplus$ is also used to denote an operation.

5. There is no one meaning for $\displaystyle \oplus$.
I have seen it used in many, many different ways.
So do you mean $\displaystyle u \oplus v = u - v$?
Sometimes $\displaystyle \oplus$ is also used to denote an operation.
no I mean u $\displaystyle \oplus$ v = v - u (in vector terms)