this post was submitted on 16 May 2024

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467

Bro tried to divide by zero (sh.itjust.works)

submitted 6 months ago by [email protected] to c/[email protected]

22 comments fedilink hide all child comments

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[–] [email protected] 3 points 5 months ago* (last edited 5 months ago)

~~Typing in 80085 can get your calculator privledges revoked welcome to the new normal~~

Wait wtf, is that gnome-calculator? You'd have to do some truly extreme shit to get banned from an open source program.

[–] [email protected] 4 points 6 months ago (1 children)

That yours @[email protected] ? :D

[–] [email protected] 6 points 6 months ago* (last edited 6 months ago)

https://lemmy.dbzer0.com ?

[–] [email protected] 9 points 6 months ago (2 children)

❯ qalc
> 1/0

  1 / 0 = 1 / 0

[–] [email protected] 2 points 6 months ago

Thank you for enlightening me to the existance of qalc

[–] [email protected] 1 points 6 months ago (1 children)

Finally! Now humanity knows the answer!

[–] [email protected] 1 points 6 months ago

I even does prime factorization of integers longer than 64bit

[–] [email protected] 25 points 6 months ago

[–] [email protected] 25 points 6 months ago (1 children)

5318008

[–] [email protected] 17 points 6 months ago

AHHH MY VIRGIN EYES!

[–] [email protected] 2 points 6 months ago

Another deltachat enjoyer?

[–] [email protected] 43 points 6 months ago (2 children)

LoL I just tried 10/0 and got "Not a number".

[+] [email protected] -8 points 6 months ago (3 children)

AFAIK that should give you +infinity, not NaN

[–] [email protected] 30 points 6 months ago (2 children)

Almost. 1/x approaches infinity from the positive direction, but it approaches negative infinity from the negative direction. Since they approach different values, you can't even say the limit of 1/x is infinity. It's just undefined.

[–] [email protected] 6 points 6 months ago (1 children)

https://en.wikipedia.org/wiki/Division_by_zero#Floating-point_arithmetic

In IEEE arithmetic, division of 0/0 or ∞/∞ results in NaN, but otherwise division always produces a well-defined result. Dividing any non-zero number by positive zero (+0) results in an infinity of the same sign as the dividend. Dividing any non-zero number by negative zero (−0) results in an infinity of the opposite sign as the dividend. This definition preserves the sign of the result in case of arithmetic underflow.

[–] [email protected] 0 points 6 months ago (2 children)

10/0 ≠ lim x->0+ 10/x

Or in other words, the thing you keep quoting does not apply in this case. Any number divided by zero is undefined, not positive infinity (or negative infinity for that matter).

[–] [email protected] 7 points 6 months ago

It's undefined in math, but not floating point arithmetic

[–] [email protected] 12 points 6 months ago

it is possible to rigorously say that 1/0 = ∞. this is commonly occurs in complex analysis when you look at things as being defined on the Riemann sphere instead of the complex plane. thinking of things as taking place on a sphere also helps to avoid the "positive"/"negative" problem: as |x| shrinks, 1 / |x| increases, so you eventually reach the top of the sphere, which is the point at infinity.

[–] [email protected] 6 points 6 months ago (1 children)

It's an error, since no amounts of zeros, even infinite, would make it equal 10.

[–] [email protected] 3 points 6 months ago

https://en.wikipedia.org/wiki/Division_by_zero#Floating-point_arithmetic

In IEEE arithmetic, division of 0/0 or ∞/∞ results in NaN, but otherwise division always produces a well-defined result. Dividing any non-zero number by positive zero (+0) results in an infinity of the same sign as the dividend. Dividing any non-zero number by negative zero (−0) results in an infinity of the opposite sign as the dividend. This definition preserves the sign of the result in case of arithmetic underflow.

[–] [email protected] 36 points 6 months ago

You are technically correct, the best kind of correct