When trying\check{k} or\not{k} the accent is rendered left of k, not above k:

This is the code to create the above image:

fromnumpyimport*frommatplotlib.pyplotimport*#matplotlib.rc('text', usetex=True)figure(figsize=(6,1) )axis('off')title(r"|$\check{k}$|$\hat{k}$|$\dot{k}$|$\ddot{k}$|$\grave{k}$|$\acute{k}$|$\tilde{k}$|$\breve{k}$|$\bar{k}$|$\not{k}$|$\vec{k}$|$\widetilde{k}$|$\widehat{k}$|$\overleftarrow{k}$|$\overrightarrow{k}$|$\overline{k}$|" )# Unknown symbol: \underline (at char 0), (line:1, col:1)# Unknown symbol: \overbrace (at char 0), (line:1, col:1)# Unknown symbol: \underbrace (at char 0), (line:1, col:1)# $\underline{k}$|$\overbrace{k}$|$\underbrace{k}$|tight_layout()savefig("testAccents.png" )show()

When uncommentingusetex=True the output is:

I.e. the accents are rendered correctly now, but the vertical bars are for some reason rendered as horizontal bars suddenly. Not sure if I should open yet another issue for that?

Just for comparison, this is whatcodecogs renders:

Also as indicated in the sourcecode\underline{...}\overbrace{...}\underbrace{...} don't work at all. I tested those, because they were in the same "accent"(?)-category in the codecogs equation editor.

System:

• Debian Sid
• python-matplotlib 1.5.3-1
• python 2.7.11-2
• Everything installed through apt-get