D.15.15.1 visualize | | shows a scheme in index-notation |

D.15.15.2 u | | gives some vector; depends on @derivatives |

D.15.15.3 scheme | | computes the finite difference scheme defined by v1,..,vn |

D.15.15.4 laxfrT | | Lax-Friedrich-approximation for the time-direction |

D.15.15.5 laxfrX | | Lax-Friedrich-approximation for the space-direction |

D.15.15.6 forward | | forward-approximation |

D.15.15.7 backward | | backward-approximation |

D.15.15.8 central1st | | central-approximation of first order |

D.15.15.9 central2nd | | central-approximation of second order |

D.15.15.10 trapezoid | | trapezoid-approximation |

D.15.15.11 midpoint | | midpoint-approximation |

D.15.15.12 pyramid | | pyramid-approximation |

D.15.15.13 setinitials | | constructs and sets the basering for further computations |

D.15.15.14 errormap | | performs the Fouriertransformation of a poly |

D.15.15.15 matrixsystem | | gives the scheme of a pde-system as one matrix |

D.15.15.16 timestep | | gives the several timelevels of a scheme derived from a pde-system |

D.15.15.17 fouriersystem | | performs the Fouriertransformation of a matrix scheme |

D.15.15.18 PartitionVar | | partitions a poly into the var(n)-part and the rest |

D.15.15.19 ComplexValue | | computes the complex value of f, var(1) being the imaginary unit |

D.15.15.20 VarToPar | | substitute var(i) by par(i) |

D.15.15.21 ParToVar | | substitute par(i) by var(i) |

D.15.15.22 qepcad | | ask QEPCAD for equivalent constraints to f<1 |

D.15.15.23 qepcadsystem | | ask QEPCAD for equivalent constraints to all eigenvals of some matrices being <1 |