# Master Gee

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5

## Community Reputation

10 Neutral

• Rank
Lepton
• Birthday 03/20/1987
1. ## Real number axioms

Cheers, sorry for wondering off topic!
2. ## Time travel theories

The lay man approach to time travel seems somewhat strange to me. Let us assume it is possible for a moment. Sorry to lower the tone, but the media (such as films and TV) shows theories of time travel that suggest that time is not linear and it is constantly warping through various states of existance - what I mean is, that if we were able to travel back through time and change events we would constantly be warping through various alternatative existances. I think it is more sensible to suggest that time is linear. Also, I agree with the theory of time dilation - time may be slowed down or sped up relative to time in a different space - as suggested by Einstein and others. However, Einstein also suggests that once velocity of matter matches the speed of light it stands still in time. Exceeding it results in reversing time and hence he determined that the speed of light was the maximum velocity attainable (I think) in the universe. I feel this is debateable. Please submit your own theories or dispute these ideas. Cheers Gee
3. ## Homebuilt Hovercraft

I saw one get made on telly once. They used a leaf blower on a piece of circular plywood with a high strength bag with punctures in wrapped around its base. There was a hole in the plywood so the leaf blower blew into that and kind of vaguely hovered. They used CO2 cylinders for propulsion. Wasn't great but it moved.
4. ## Real number axioms

Could someone please explain to me this axiomisation of real numbers to me? I study further maths at A level and I have not come across this. Is it basically a set of definitions for the various sets of numbers? Cheers
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