# \lim{} weirdness and \norm{} disfunctional

• Jul 9th 2010, 04:42 AM
livingdog
\lim{} weirdness and \norm{} disfunctional
I just posted and found something weird. The 'limit' tag worked in preview, but then in post it changed the "h -> 0" to a subscript - not an underscript, namely: $\displaystyle \lim_{h\rightarrow0}$

The 'norm' tag does not work, so I used double vertical bars $\displaystyle ||\vec{x}||$.
• Jul 9th 2010, 04:52 AM
mr fantastic
Quote:

Originally Posted by livingdog
I just posted and found something weird. The 'limit' tag worked in preview, but then in post it changed the "h -> 0" to a subscript - not an underscript, namely: $\displaystyle \lim_{h\rightarrow0}$

The 'norm' tag does not work, so I used double vertical bars $\displaystyle ||\vec{x}||$.

To get $\displaystyle \displaystyle{\lim_{h \to 0}$ you have to use the \displaystyle command.
• Jul 9th 2010, 04:53 AM
Ackbeet
For me, even in the preview, I get subscripts for limits, not underscripts like I'd prefer.
• Jul 9th 2010, 04:55 AM
Opalg
For the norm, use \| (backslash vertical bar) to get $\displaystyle \|$.
• Jul 9th 2010, 08:05 AM
livingdog
[I] the limit: (from The Art Of Problem Solving)

"That summation symbol is a little ugly. We can make it prettier by using the \displaystyle:" (edited for this thread)

$\displaystyle \displaystyle\lim_{h\rightarrow0}\frac{1}{h} \neq 0$

[II] the norm:

backslash norm $\displaystyle \|\vec{x}\|$ $\displaystyle \leftarrow$ (Clapping)
vs
piped norm $\displaystyle ||\vec{x}||$ $\displaystyle \leftarrow$ (Doh)

[III] Here are more symbols than one should be allowed to know:

aka
The Comprehensive LaTeX Symbol List.