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## Dotless i and j

I'm wondering how to get dotless i and j in LaTeX on the forums. For some reason, \i and \j don't work for this. I can use \imath and \jmath, and I can even get carets on them to represent unit vectors:

$$\hat{\imath}, \hat{\jmath}$$

The only remaining problem is that I can't get them to be typeset in boldface and upright as vectors traditionally are. If I do this hack:

$$\hat{\textbf{\imath}}, \hat{\textbf{\jmath}}$$

then I can get them boldface, but still not upright. I think that the glyphs for \imath and \jmath are inherently italicized and there is no way to change this. Any suggestions for the OCD among us?

 PhysOrg.com science news on PhysOrg.com >> Heat-related deaths in Manhattan projected to rise>> Dire outlook despite global warming 'pause': study>> Sea level influenced tropical climate during the last ice age
 Blog Entries: 47 Recognitions: Gold Member Homework Help Science Advisor From http://groups.google.com/group/mathj...%2F2010-11%3F& MathJax can use unicode... $$\mbox{abcdefgh}\ \unicode{x0131}\unicode{x0237}\ \mbox{klmnopqrstuvwyz}$$ You could define a macro for \i and \j $\def\i{\unicode{x0131}} \i$ $\def\j{\unicode{x0237}} \j$ (right-click show source) then use it later $$\i i\mbox{i}$$ $$\j j\mbox{j}$$

Mentor
 Quote by robphy From http://groups.google.com/group/mathj...%2F2010-11%3F& MathJax can use unicode... $$\mbox{abcdefgh}\ \unicode{x0131}\unicode{x0237}\ \mbox{klmnopqrstuvwyz}$$ You could define a macro for \i and \j $\def\i{\unicode{x0131}} \i$ $\def\j{\unicode{x0237}} \j$ (right-click show source) then use it later $$\i i\mbox{i}$$ $$\j j\mbox{j}$$
So, definitions that people make using \def are universal and permanent (or at least persist until some user gives the same macro a different definition)???

In any case, it still doesn't work:

$$\def\i{\unicode{x0131}} \hat{\mathbf{\i}}$$

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Homework Help

## Dotless i and j

How's this?

$\def\ihat{\hat{\unicode{x0131}\!\!\unicode{x0131}}} \ihat$ $\def\jhat{\hat{\unicode{x0237}\!\!\!\unicode{x0237}}} \jhat$

$$8\ihat + 6\jhat$$

 Quote by robphy How's this? $\def\ihat{\hat{\unicode{x0131}\!\!\unicode{x0131}}} \ihat$ $\def\jhat{\hat{\unicode{x0237}\!\!\!\unicode{x0237}}} \jhat$ $$8\ihat + 6\jhat$$ I suspect your \defs are local to your post.
$\def\jhat{\hat{\unicode{x0237}\!\!\unicode{x0237}}} \jhat$