737

near zero (mander.xyz)

submitted 4 months ago by fossilesque@mander.xyz to c/science_memes@mander.xyz

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[-] PlexSheep@infosec.pub 13 points 4 months ago

What do you mean? In two's complement, there is only one zero.

[-] yetAnotherUser@feddit.de 39 points 4 months ago

IEEE 754 floating point numbers have a signed bit at the front, causing +0 and -0 to exist.

[-] henfredemars@infosec.pub 18 points 4 months ago

Specifically I was referring to standard float representation which permits signed zeros. However, other comments provide some interesting examples also.

[-] hungrybread@hexbear.net 4 points 4 months ago

https://en.m.wikipedia.org/wiki/Ones%27_complement

[-] mexicancartel@lemmy.dbzer0.com 4 points 4 months ago

Who use ones complement?

[-] hungrybread@hexbear.net 2 points 4 months ago

I assume no one at this point

[-] mexicancartel@lemmy.dbzer0.com 3 points 4 months ago

I think 1's complement only existed to facilitate 2's complement. Otherwise its stupid

[-] sus@programming.dev 4 points 4 months ago

floats

[-] Zerush@lemmy.ml 2 points 4 months ago

1- 0,99999....

[-] PlexSheep@infosec.pub 2 points 4 months ago

Floating point numbers are not possible in two's complement, besides that, what is your point? 0,99999999... is probably the same as 1.

[-] Zerush@lemmy.ml 2 points 4 months ago

Yes, mathematically it's the same, but in physics there's a guy named Heisenberg who denies that 0.99999... really gets to 1. There is always this difference, for a mathematician infinite is not a problem, but for a physicist it is, plus a very big one.