Could you help me please, I need a mirror lambda as the sub-indice in the picture. I tried `d_{{\reflectbox{$\lambda$}}_j}´ without success. enter image description here


2 Answers 2


Go to the webpage https://detexify.kirelabs.org/classify.html and draw the symbol. The classifier will tell you that it is the symbol \rightthreetimes from the amssymb packages.

enter image description here

\usepackage{amsmath}% \begin{cases} ... \end{cases}
\usepackage{amssymb}% \rightthreetimes
    d_\rightthreetimes\geq a, d_\rightthreetimes\geq b, d_\rightthreetimes\geq c\\
    a + b + c \geq 2d_\rightthreetimes\\
    a + b + c \leq 2

You can use \mathpalette (you find several examples on the site).


\DeclareRobustCommand{\mlambda}{% mirror lambda





enter image description here

  • 1
    That looks very odd, with the serif, weight axis and italic-slant flipped as well as the strokes. Jun 23 at 12:14

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