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**Amartyanil****Member**- From: Universe
- Registered: 2013-05-27
- Posts: 60

Hi;

All things on a planet or a sattelite, that we see straight are actually curved and the things that we see curved are actually straight!

"You can never be too old or too young. A person's age is irrelevant." - bobbym

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Explain...

'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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**Amartyanil****Member**- From: Universe
- Registered: 2013-05-27
- Posts: 60

The theory of curveness is true because any planet, satellite or star are always spherical in shape.

Things on a planet, satellite or a star that we see straight are actually curved because when we come beyond the planet, we see the thing curved. E.g., the great wall is straight on it upper or the lower surface, beyond it's planet we see that the great wall is curved.

"Things on a planet, satellite or a star that we see curved are actually straight", this theory is right or wrong, I cannot prove it.

"You can never be too old or too young. A person's age is irrelevant." - bobbym

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

Well, nothing is exactly straight. Do you have some kind of a definition of a real world straight line?

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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Definition: A figure is said to be straight (in a three dimensional space) if the two endpoints of the figure are at minimal distance.

'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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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

Minimal as compared to?

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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It is the least possible distance and only one such configuration exists.

'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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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

The "least possible distance" depends on the metric used. Each space has it's own metric.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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What is a metric?

'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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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

It's a function that assigns values to distances. It also has to satisfy a few properties, but those are not important for what we're discussing.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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In the 3D space, I can only concieve of one kind of distance. Please explain if there exists others

'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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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,000

The one you are thinking of is called the Euclidian distance. There exist others. There is quite a bit on this on the net.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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With what keyword should I search for?

'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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,793

http://en.wikipedia.org/wiki/Metric_%28mathematics%29

The term is used a lot in vector analysis and differential geometry.

**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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**Amartyanil****Member**- From: Universe
- Registered: 2013-05-27
- Posts: 60

Amartyanil wrote:

Hi;

All things on a planet or a sattelite, that we see straight are actually curved and the things that we see curved are actually straight!

I have corrected it:

All things on any spherical celestial bodies that we see straight are curved and I am not sure about curved things.

"You can never be too old or too young. A person's age is irrelevant." - bobbym

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Two things are infinite, stupidity and the universe... I am not sure about the universe.

-Einstein

'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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,793

Abraham Pais wrote:

Einstein, this little man...

**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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