- Thread starter
- #1

- Jun 22, 2012

- 2,918

Can someone help with the correct Latex for this?

Peter

- Thread starter Peter
- Start date

- Thread starter
- #1

- Jun 22, 2012

- 2,918

Can someone help with the correct Latex for this?

Peter

- Admin
- #2

\left(\frac{x^2}{3y^2-2} \right)^2

produces:

\(\displaystyle \left(\frac{x^2}{3y^2-2} \right)^2\)

You can use them with other brackets (right-click to see the codes used)

\(\displaystyle \left\lfloor \frac{\sqrt{x}}{2} \right\rfloor\)

\(\displaystyle \left.\frac{dy}{dx} \right|_{x=3}\)

\(\displaystyle \left\langle \cos^2(t),\sin(t)-\frac{t}{3} \right\rangle\)

- Thread starter
- #3

- Jun 22, 2012

- 2,918

Thanks Mark, appreciate the help ...

\left(\frac{x^2}{3y^2-2} \right)^2

produces:

\(\displaystyle \left(\frac{x^2}{3y^2-2} \right)^2\)

You can use them with other brackets (right-click to see the codes used)

\(\displaystyle \left\lfloor \frac{\sqrt{x}}{2} \right\rfloor\)

\(\displaystyle \left.\frac{dy}{dx} \right|_{x=3}\)

\(\displaystyle \left\langle \cos^2(t),\sin(t)-\frac{t}{3} \right\rangle\)

I tried

f \left( g(x) \right)

and got

\(\displaystyle f \left( g(x) \right) \)

but I wanted the parentheses around the g(x) to be larger ... in some cases I would want them considerably larger ... than the parentheses around the x - which, alas, as you can see did not happen

Can you help further ... what am I missing?

- Moderator
- #4

- Feb 7, 2012

- 2,706

You can specify the size manually if you do not like the results given by \left and \right. The commands (for increasing sizes) are \bigl, \Bigl, \biggl and \Biggl, with corresponding commands on the right (\bigr etc.). The results (starting with a regular size parenthesis) look like $(\ \bigl( \ \Bigl( \ \biggl( \ \Biggl($.I tried

f \left( g(x) \right)

and got

\(\displaystyle f \left( g(x) \right) \)

but I wanted the parentheses around the g(x) to be larger ... in some cases I would want them considerably larger ... than the parentheses around the x - which, alas, as you can see did not happen

Can you help further ... what am I missing?

I always use the \bigl and \bigr commands for expressions like the one you want: $f\bigl(g(x)\bigr).$

- Thread starter
- #5

- Jun 22, 2012

- 2,918

You can specify the size manually if you do not like the results given by \left and \right. The commands (for increasing sizes) are \bigl, \Bigl, \biggl and \Biggl, with corresponding commands on the right (\bigr etc.). The results (starting with a regular size parenthesis) look like $(\ \bigl( \ \Bigl( \ \biggl( \ \Biggl($.

I always use the \bigl and \bigr commands for expressions like the one you want: $f\bigl(g(x)\bigr).$

Thanks Opalg ... Most helpful

Peter

- Admin
- #6

The left and right commands only make the bracketing symbols as "tall" as the expressions they are enclosing...but I also learned some new commands fromThanks Mark, appreciate the help ...

I tried

f \left( g(x) \right)

and got

\(\displaystyle f \left( g(x) \right) \)

but I wanted the parentheses around the g(x) to be larger ... in some cases I would want them considerably larger ... than the parentheses around the x - which, alas, as you can see did not happen

Can you help further ... what am I missing?

- Admin
- #7

- Jan 26, 2012

- 4,192

$$\left( \frac{45}{x-3} \right)^{2} \quad \text{with} \quad \left( \frac{45}{x-3} \right)^{ \! \!2} \quad \text{or even, with one \!, } \left( \frac{45}{x-3} \right)^{ \! 2}.$$

- If you want to have just a right, you have to \left. and then \right| whereas with big you can just do \big|
- If you are using an align environment, and you want a \left one side of the ampersand =, you need to then do a phantom to have equal hieght spacing on the right sides and you need \right. and a \left. Again, the use of \big( doesn't cause this issue

- Thread starter
- #9

- Jun 22, 2012

- 2,918

- If you want to have just a right, you have to \left. and then \right| whereas with big you can just do \big|
- If you are using an align environment, and you want a \left one side of the ampersand =, you need to then do a phantom to have equal hieght spacing on the right sides and you need \right. and a \left. Again, the use of \big( doesn't cause this issue

Can someone help me with the Latex code to obtain a large { and a large }?

I have tried the following but it does not seem to work:

\Biggl{ \Biggr}

Help would be appreciated.

Peter

- Admin
- #10

You need to "escape" the brackets by preceding them with a backslash:Can someone help me with the Latex code to obtain a large { and a large }?

I have tried the following but it does not seem to work:

\Biggl{ \Biggr}

Help would be appreciated.

Peter

\Biggl\{ \Biggr\}

produces:

\(\displaystyle \Biggl\{ \Biggr\}\)

What you are trying to do is render an escape character. The escape characters are: \ % $ { & # ~ ^. These render with \%, \$, \{, \&, \#. You can render \ with either \_ or \textbackslash. ~ can be render with \sim or \textasciitilde. Lastly, ^ is rendered with \textasciicircumCan someone help me with the Latex code to obtain a large { and a large }?

I have tried the following but it does not seem to work:

\Biggl{ \Biggr}

Help would be appreciated.

Peter

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