ratio of the hypotenuse to the adjacent side of a right-angled triangle | sec; secant; |

the inverse function of the secant; the angle that has a secant equal to a given number | arc secant; arcsec; arcsecant; inverse secant; |

ratio of the hypotenuse to the opposite side of a right-angled triangle | cosec; cosecant; |

the angle that has a cosecant equal to a given number | arc cosecant; arccosecant; inverse cosecant; |

a function that takes the value 1 if a specified function of the arguments exceeds a given threshold and 0 otherwise | threshold function; |

a function in which an independent variable appears as an exponent | exponential; exponential function; |

an equation involving exponential functions of a variable | exponential equation; |

a graph of an exponential function | exponential curve; |

a mathematical expression consisting of a constant (especially e) raised to some power | exponential expression; |

a series derived from the expansion of an exponential expression | exponential series; |

(mathematics) a relation between a pair of integers: if both integers are odd or both are even they have the same parity; if one is odd and the other is even they have different parity | parity; |

the parity of even numbers (divisible by two) | evenness; |

the parity of odd numbers (not divisible by two) | oddness; |

the basis on which something is grounded | foundation; |

a relation that provides the foundation for something | basis; footing; ground; |

a basis agreed to by all parties for reaching a mutual understanding | common ground; |

the essential foundation or source | grass roots; |

a relation between things or events (as in the case of one causing the other or sharing features with it) | connectedness; connection; connexion; |

(electronics) connection of components in such a manner that current flows first through one and then through the other | series; |

a connection based on kinship or marriage or common interest | alliance; bond; |