Latex Code for a Parenthesis ....

[Math Amateur]

In a recent post on the Cauchy-Schwarz Inequality I wished to "size" the parentheses adequately in the expression $$x = \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y + ( x - \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y ) $$... ... but in order to use \left and \right I need to also use the Latex Code for ( and ) ... but what is the code for a left and right parenthesis ... ?Hope someone can help ...

Peter

 

[Greg]

\left(...\right)

Example:

$$\left( x - \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y \right)$$

As a side note, for a single sized parenthesis use \left(...\right. or \left. ...)\right)

Examples:

$$\left(\frac12\right.$$

$$\left.\frac12\right)$$

 

[Math Amateur]

\left(...\right)

Example:

$$\left( x - \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y \right)$$

As a side note, for a single sized parenthesis use \left(...\right. or \left. ...)\right)

Examples:

$$\left(\frac12\right.$$

$$\left.\frac12\right)$$

Thanks for your help greg1313 ...

It is much appreciated ...

Peter

 

[Joppy]

Thanks for your help greg1313 ...

It is much appreciated ...

Peter

Also, for curly braces: \left\lbrace .. \right\rbrace

e.g. $ \left\lbrace\dfrac{\dfrac{a}{b}}{\dfrac{a}{b}} \right\rbrace$

 

[I like Serena]

Alternatively, we can use [M]\Big[/M] and [M]\big[/M] for parentheses that wouldn't otherwise scale:
$$\Big( \cos x + \cos \big( x+(k+1)\pi \big) \Big)$$
[latexs]\Big( \cos x + \cos \big( x+(k+1)\pi \big) \Big)[/latexs]

We can also use [M]\Big[/M] and [M]\big[/M] for a single bracket $\Big]$ that would also otherwise be too small:
$$\int_0^{2\pi} \cos x\,dx = \sin x \Big|_0^{2\pi}$$
[latexs]\int_0^{2\pi} \cos x\,dx = \sin x \Big|_0^{2\pi}[/latexs]

And there's more variants:
$$\big\{ \Big\{ \bigg\{ \Bigg\{$$
[latexs]\big\{ \Big\{ \bigg\{ \Bigg\{[/latexs]