Moodle in English: How do you do this symbol?

How do you do this symbol?

by Fabian Glagovsky - Thursday, November 5, 2020, 6:03 PM

Hi,

I saw that it is possible. How do you do these symbols in which one letter is directly above or below the other?

new buttons for the math editor

I would like to use it for limits.

lim

x --> n

I want to add those buttons to my editor.

I saw the examples here https://moodle.org/mod/forum/discuss.php?d=258631

Thanks in advance for any help.

subscript \( a_b \) is not good because the subscript appears on the right.

Best,

Re: How do you do this symbol?

by Daniel Thies - Thursday, November 5, 2020, 8:44 PM

There is a distinction in printing between how limits or aggregations are displayed when they appear in a line \( \sum^n_{k=1} \frac1n\) and between lines \[ \sum^n_{k=1}\frac1n. \]
You can change from inline display by changing delimiters from round brackets to square ones or including \displaystyle \(\TeX\) command word in the expression.

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Re: How do you do this symbol?

by Fabian Glagovsky - Tuesday, November 10, 2020, 2:57 PM

Hi Daniel,
I tried square brackets but it just doesn't change anything from round brackets.
\( \lim_{x \to 2} f(x) = 5 \) is similar to \[ \lim_{x \to 2} f(x) = 5 \]
And \displaystyle just throws me an error, it doesn't interpret it.

EDIT. I see that it does a change here in this Moodle. Maybe I should change the order of my filters? What's the order you use?

I am using Multilanguage Content (v2)

TeX notation

Algebra notation

Mathjax

Multimedia plugins

Kaltura media.

Further EDIT

Yes! That was the issue. I moved Mathjax to the top, below Multilanguage and now the square brackets work!

Thank you Daniel!

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Re: How do you do this symbol?

by Daniel Thies - Tuesday, November 10, 2020, 9:23 PM

You may not have the latex binaries installed which are used by TeX notation filter. If they are missing the filter defaults to using mimetex that does not support displaystyle. If the TeX filter is not configured, it may be better to disable it.

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Re: How do you do this symbol?

by Fabian Glagovsky - Wednesday, November 11, 2020, 3:21 PM

Hi Daniel, how can I find if that is the case?
I did manage to make the code work, after moving up the filter MathJax.
Should I still think about disabling TeX? I am of the attitude that "if it works, don't touch it".
Best,
Fabian

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Re: How do you do this symbol?

by Stephan Bach - Wednesday, November 11, 2020, 4:40 PM

Normally there is also the option of using \lim\limits_{x \to 2} f(x) = 5 with inline maths. Maybe this works?
Stephan

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Re: How do you do this symbol?

by Fabian Glagovsky - Wednesday, November 11, 2020, 5:17 PM

Yes, that works too!

Thank you!

Best,

Fabian

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Mathematics tools

How do you do this symbol?