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

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## Topic review (newest first)

Agnishom
2013-09-24 00:45:44

#### 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

bobbym
2013-09-24 00:33:08

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.

auyeungyat
2013-09-24 00:04:39

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?

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