*N* | Diploid population size |

*N*_{1}, *N*_{2} | Effective population size at the *Fav* and the *Neu* locus, respectively |

*s, t* | Selection coefficients of favorable and deleterious alleles, respectively |

*r*_{1}, *r*_{2} | Recombination fraction between *Del* and *Fav* and between *Fav* and *Neu*, respectively |

α | Strength of directional selection = 2*Ns* |

*u* | Rate of deleterious mutations per generation per locus |

*u*_{f} | Rate of favorable mutations per generation per population |

μ | Rate of neutral mutations per generation per locus (nucleotide) |

Π | Reduction factor of the fixation probability of favorable mutations |

Φ | Fixation probability of favorable mutations |

*f*_{H}, *f*_{B} | Reduction factors of the stationary level of heterozygosity due to recurrent hitchhiking events and background selection, respectively |

*h* | Reduction of heterozygosity due to a single hitchhiking event |

π | Heterozygosity per nucleotide |

θ | Expected heterozygosity without hitchhiking (= 4*N*_{2}μ) |

*H* | Cumulative heterozygosity of one trajectory of a neutral allele |

*p*_{a}, *p*_{B} | Allele frequencies of *a* and *B*, respectively |

ρ | Recombination rate per nucleotide per generation |

τ | Number of generations until the last hitchhiking event |

ν | Number of advantageous substitutions per generation per nucleotide |