Get flash to fully experience Pearltrees
This is the symbol table. Supported symbols are listed here (alphabetically). Symbols can also be trained here. Just pick a symbol you sometimes need but tend to forget and click it. A canvas will open for your training input.
What is this? Anyone who works with LaTeX knows how time-consuming it can be to find a symbol in symbols-a4.pdf that you just can't memorize. Detexify is an attempt to simplify this search. How do I use it? Just draw the symbol you are looking for into the square area above and look what happens!