TITLE: What does $\Lsh$ mean?
QUESTION [6 upvotes]: Source: Wikipedia (permalink), in the formula for the heat capacity ratio:
$$Y=\biggl({Cp\over \Lsh Cv}\biggr)$$
The $\LaTeX$ command is \Lsh.

REPLY [6 votes]: This picture was introduced with the version of 16:08, 10 June 2016‎‎ with the comment "Replacing the typed formulae with the picture formulae". This replacement went wrong.
The previous version of 07:45, 11 April 2016‎ still uses the string
γ = Cp/ Cv

The link heat ratio in the text refernces a page with the picture

So the correct formula seems to be
$$\gamma=\frac{C_P}{C_V}$$
I therefore changed this in the  Wikipedia article, Version of 00:00, 20 April 2017‎