## #10 Floor and ceiling reversed

closed-fixed
nobody
5
2009-02-17
2008-10-14
Marty
No

My students noticed the following font bug. Most of them are using "native unicode fonts", rather than downloading the jsMath fonts. One student noticed that "floors and ceilings are reversed". In other words, using unicode fonts, \$\lfloor\$ gets displayed as \$\lceil\$ should, and \$\rfloor\$ gets displayed as \$\rceil\$ should, and vice versa.

An example can be found at http://slugmath.ucsc.edu/mediawiki/index.php/User:Marty/Sandbox
The problem seems to only occur with native unicode fonts.

Thank you for your assistance!

- Marty Weissman

## Discussion

• You are absolutely right, the unicode table for the PC had these characters switched. How embarrassing!

I have attached an updated copy of jsMath-fallback-pc.js (zipped) that you should use to replace the existing one in your jsMath directory. That should take care of the problem, I hope.

Please thank your students for me for noticing and pointing out the problem.

Davide