Symbol | Meaning |

C | channel capacity |

C | maximum channel capacity |

C | number of characters per word |

$\Delta {C}_{kj}$ | capacity difference |

G | readability index |

G | semantic term |

G | syntactic term |

I | total number of interpunctions |

I | number of words per interpunction (word interval) |

I | horizontal asymptote |

m | slope |

n | number of interpunctions per chapter |

n | number of sentences per chapter |

n | number of words per chapter |

m | slope for maximum capacity C |

m | slope |

M | number of interpunctions per sentence |

N | regression noise power |

N | correlation noise power |

n | noise source |

${n}_{j,tot}$ | total noise source |

P | number of words per sentence |

P | 1/e of exponential maximum value |

r | correlation coefficient |

${r}_{m=1}$ | irreducible correlation coefficient |

R | total noise-to-signal power ratio |

R | regression noise-to-signal power ratio |

R | correlation noise-to-signal power ratio |

R | minimum noise-to-signal power ratio |

$\rho $ | signal-to-noise power ratio |

S | total number of sentences |

${s}_{x}^{2}$ | variance of x |

${s}_{nk}^{2}$ | noise variance (power) |

Y | input language |

Y | output language |

W | total number of words |