11 Jul 1998 23:42:56 -0400

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Re: Is infinity equal to infinity? darcy@usul.CS.Berkeley.EDU (1998-07-20) |

[5 later articles] |

From: | Kevin@quitt.net (Kevin D. Quitt) |

Newsgroups: | sci.math.num-analysis,comp.lang.c,sci.math,comp.compilers |

Date: | 11 Jul 1998 23:42:56 -0400 |

Organization: | If was organized, would I be reading Net News? |

Distribution: | inet |

References: | 98-07-058 98-07-089 |

Keywords: | arithmetic |

*> So it makes (practical) sense to say that "x == NaN" should be false*

*> (because "==" is a numerical comparison).*

It is guaranteed to be false. The appropriate test for x having the value NaN

is (x == x) - which will be false if x is NaN.

*>The result Inf - Inf = NaN also makes sense (for practical purposes),*

It makes sense mathematically, since Inf - Inf can have any value.

--

Kevin D Quitt USA 91351-4454

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