1/0 returns Infinity

[Akhil Pillai]

Describe the bug
dividing by zero gives Infinity, should be undefined or NaN

To Reproduce

import { evaluate } from 'mathjs';
console.log(evaluate('1/0'));

[Athan]

The current behavior matches built-in JavaScript behavior for arithmetic operations.

console.log(1/0);
// => Infinity

[Akhil Pillai]

While that may be, it's mathematically incorrect not as common as undefined or NaN.

[Athan]

That is not strictly true. While a common convention is to define division-by-zero as undefined, this is not a mathematical law, and, in different domains, defining division-by-zero to be infinity, zero, or signed infinity is perfectly valid.

[David Contreras]

Just for fun I tried `1/0` in Wolfram Alpha, Julia and Matlab and they yield Infinity. I understand the discussion might be more complex than this but I wanted to include these references.

[Jos de Jong]

We can discuss about what the best result would be for 1/0, there are various valid choices: Infinity, NaN, undefined, or throwing an exception. We simply have to make a choice. For mathjs we did choose to return Infinity (similar to JavaScript, Mathematica, Matlab). At this point I think it's just fine to keep it like that, OK @akpi816218?

[Akhil Pillai]

all right then, closing this issue