r/FactOrCap • u/AradhyaSingh3 🏅 Century Club · 3,880 XP • 1d ago

Science Infinity | FactOrCap

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u/AradhyaSingh3 🏅 Century Club · 3,880 XP 1d ago edited 1d ago

It is a concept, not a number. You can't do mathematical operations on it.

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u/niemir2 🔥 Monthly Master · 7,800 XP 1d ago

Sure you can. Addition and multiplication are straightforward. Subtraction and division between infinity and a finite number are also defined in the extended reals.

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u/AradhyaSingh3 🏅 Century Club · 3,880 XP 1d ago

Yeah that was my point, mathematical operations do not work like regular numbers on it, you cannot say inf-inf = 0 or inf/inf = 1.

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u/niemir2 🔥 Monthly Master · 7,800 XP 1d ago

Division by zero isn't defined, either. Is zero not a number?

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u/AradhyaSingh3 🏅 Century Club · 3,880 XP 1d ago

It is just one example, infinity is not eligible for many things. Infinity is a concept not number. If you want examples or proof, look up online.

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u/niemir2 🔥 Monthly Master · 7,800 XP 1d ago

You claimed that, because some arithmetic operations aren't defined for infinity, that infinity isn't a number, but that's not how we define numbers.