#### 1` `Simple formulas

@f{x^2/y^2} |

@f{y_{ij}} |

@f|{y_{ij}}| or even @f|-{y_{ij}}-| |

There is also the display-style @equation{...} which allows formula labeling using @equation[#:tag "FormulaName"]{...}.

It is also possible to manually align the formulas, for example @f+4{x^2} produces and @f-7{x^2} gives . There is also zoomed @f+0+7{x^2} which gives and zoom with align @f-5+7{x^2} which gives .

The command @fsize[20] changes the formula size to 20pt, the command @fsize[] or equivalently @fsize=[] returns back to the previous size (but you can not nest them, there is not stack of sizes). Actually I recommend to use instead the command @fsize+[5] which changes the size relatively to the base size. This will scale better if you will have to suddenly change the resolution 3 minutes before your talk. To decrease the size, use @fsize+[@-[5]] or equivalently @(fsize+ (- 5)). Both @fsize[] and @fsize+[] have an optional second argument, which modifies the vertical base alignment.

#### 2` `Multiline formulas

@align[r.l |

@list[ |

@f{{2\over 1 - x^2} = } @f{1+x+x^2 + \ldots +} |

]@list[ |

"" @f{1-x+x^2- \ldots} |

] |

] |

@align[r.l |

@list[ |

@f{{2\over 1 - x^2} = } @v+[3 @f{1+x+x^2 + \ldots +}] |

]@list[ |

"" @f{1-x+x^2- \ldots} |

] |

] |

@align[r.l.n |

@list[ |

@f{{2\over 1 - x^2} = } @v+[3 @f{1+x+x^2 + \ldots +}] "" |

]@list[ |

"" @f{1-x+x^2- \ldots} @label{SumOfGeometricProgressions} |

] |

] |

#### 3` `Fun with Unicode

To get just type: @f{A⊗B}. In other words, we can use the Unicode symbol ⊗ instead of \otimes in formulas.

#### 4` `Color in formulas

@bystro-bg[255 200 200] @bystro-fg[0 0 250] |

@f{\; l^2 = a^2 + b^2} |

@bystro-bg[255 255 255] @bystro-fg[0 0 0] |

gives

#### 5` `Some technical details

We use JLaTeXMath to produce svg (or png) files. We had some problems with large size integral signs: and large size brackets: . As you can see, they come out a bit weird. It seems that this is caused by a general bug in OpenJDK (which is the default implementation of Java on Debian). The situation is discussed here. If this becomes a problem, use Sun JDK instead of OpenJDK. (The page you are reading now was prepared using OpenJDK.)