Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked

Re: 0 illegal modulus?

by Zaxo (Archbishop)
on Jun 16, 2001 at 12:31 UTC ( #89021=note: print w/replies, xml ) Need Help??

in reply to 0 illegal modulus?

Everybody, please pay attention to jepri. He's got it right.

The definition of Abel he mentions is that (perlishly):

my $num = $y*int($n) + $modulus;

This relation is uniquely satisfied by !$y && $modulus == $num

It does not involve division, allowing it to apply to algebrae lacking a multiplicative inverse (those are called modules).

It applies to floats too. Think $y = 2*$pi. Modulus is phase in that case.

Perl's % operator is really just remainder on integers, a bogosity which does not generalize well.

Don't fall into the trap of thinking your intuition or experience is a valid basis for modifying mathematical definitions. You will come to grief when a "proven correct" program crashes. You may blame math, but you will be wrong.

After Compline,

Update: Rereading this, I realize that it sounds directed at nella. Not the case: this is a broadcast rant. nella started a fine thread, and seems to be on the side of the angels.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://89021]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (3)
As of 2016-10-24 04:52 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (303 votes). Check out past polls.