Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**auyeungyat****Member**- Registered: 2013-09-23
- Posts: 22

I got stuck in thinking the infinity.

I thought like this:

Let infinity be x

2x=2 infinity

The main problem is:There isn't 2 times infinity!

How can it be proven?

*Last edited by auyeungyat (2013-09-23 02:04:58)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,283

Hi;

Welcome to the forum.

I think most of that was established by Cantor and the mathematicians that followed. For one thing infinity is not a number, it is a concept. The rules of arithmetic do not apply.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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auyeungyat wrote:

I got stuck in thinking the infinity.

I thought like this:

Let infinity be x

2x=2 infinity

The main problem is:There isn't 2 times infinity!

How can it be proven?

infinity is like /dev/null

Whatever you write or add to it it still remains /dev/null

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

I'm not crazy, my mother had me tested.

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