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I am working in a Jupyter notebook environment (which uses MathJax to typset math symbols in a Markup cell) writing mathematical physics equations and often related Python Numpy Sympy code in subsequent cells. It is driving me crazy that I cannot find a symbol for the so-called reduced de Broglie wavelength. It is a \lambda but with a short horizontal line (like the $\hbar$ version of Planck's constant $h$) midway on the riser of $\lambda$.

Roland
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Dalton Bentley
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    Welcome to TeX.SX. It would be better if you can put a picture of what you want. BTW, have you tried \textcrlambda? – nidhin Dec 12 '18 at 17:16
  • There is ƛ, if it's supported by the font. No “crossed lambda” is defined in Unicode, as far as I can see. It's not difficult to produce it in TeX, but Mathjax is just a different thing. A (bad) approximation might be {\mkern2mu}\bar{}{\mkern-8mu}\lambda – egreg Dec 12 '18 at 17:23
  • The link to the previous question will require some time to evaluate, but I immediately implemented the unicode insert to obtain a plausible barlamda, so am already happy. Thanks. – Dalton Bentley Dec 12 '18 at 18:52

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