Previously Randall made a similar comic, 2520: Symbols, about math symbols. Either learn from their possible advanced math (that allowed them to construct a way to get from one star system to another), or learn about them as the aliens species they represent. So if you ever meet someone using this letter while doing math, then learn as much as you can by quietly observing them, before they return to their home planet. In the title text the idea that any one using Ξ must be aliens is made clear. In the main comic those using Ξ (capital xi) greets us as Earth mathematicians, indicating they are not from Earth, but have come here to learn what we know of math. In the title text the joke about capital Xi from the main comic is continued.
![mathematica greek letters mathematica greek letters](https://i.stack.imgur.com/bUsGq.png)
This comic gives a (non-)explanation of what they typically mean, see below. Mathematics uses lots of Greek letters, typically using the same letter consistently to represent a particular constant or type of variable. If you can address this issue, please edit the page! Thanks. This has not been included and many of the letters have no explanation of the given text, only for what they actually are used for.
![mathematica greek letters mathematica greek letters](http://cliparts.co/cliparts/kcM/K6A/kcMK6Abgi.gif)
The text for each letter should be in the explanation with an attempt at explaining it. This explanation may be incomplete or incorrect: Created by O R B S PRO®- Missing explanations for some letters. Title text: If you ever see someone using a capital xi in an equation, just observe them quietly to learn as much as you can before they return to their home planet.