# How to write capital “Tau” in MathJax?

The MathJax help says writing \tau between $..$ gives $\tau$ but for capital "tau", $\Tau$ does not work. How would one write a capital tau in MathJax?

• Capital Tau in Greek is T. Sure this is useful? en.wikipedia.org/wiki/Tau – Did Nov 24 '15 at 8:43
• Actually, @Did, what you wrote was a capital Latin "tee". Here is a capital tau: Τ. – user642796 Nov 24 '15 at 8:50

What you can do is find a "capital tau" somewhere on the internet, such as here: Τ. Now copy and paste it in between two $s, like this $Τ$,* and note that it renders as$Τ$It's a bit upright, so why not italicise it with $\it Τ$ to yield$\it Τ$And then look at how it differs from $T$ (that's a capital Latin tee)$T$Not much of a difference, is there? * Alternatively, you can use the \unicode{} command, where the argument is the Unicode code point — either decimal or hexidecimal — of the desired character. Capital tau has Unicode code point 932 (decimal) or x03A4 (hexadecimal), so both $\unicode{932}$ and $\unicode{x03A4}$ should produce a captial tau. • The fact that they actually bothered to make a capital tau symbol surprises me... – AvZ Nov 25 '15 at 17:19 • @AvZ: For the Greek letters? Unicode has those because it makes it possible to automatically convert from capital to lowercase - otherwise, both$\tau$and$t$would be possible options when converting$T\$ to lowercase and it would be a lot more of a headache than it is now. – Deusovi Dec 4 '15 at 1:05