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

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**Sarah Rebekah****Member**- Registered: 2011-09-25
- Posts: 540

We could have a birthday page for members.

Love is the key to life

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

that seems like a nice idea!

we should have a birthday notifier!

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

That is! I have a birthday coming up.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

when?

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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**Sarah Rebekah****Member**- Registered: 2011-09-25
- Posts: 540

Glad u like i have a brithday comeing up to

Love is the key to life

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

Hi anonimnystefy;

In June.

Thanks Sarah.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,736

hi everybody,

I think I've got a theorem here:

Cannot get a 'complement' bar over my set on the same line as the phi.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

hi bob

why not just use \frac ?

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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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,736

hi Stefy,

I was try to express the following

The complement of the set {people who have a birthday coming up} = phi = empty set.

You'll notice I was trying to inject some maths into the thread; sorry Sarah Rebekah.

btw Mine's in January.

So I wanted to get a bar over the whole of the set ... tried \bar (put the bar over the letter 'b' in the middle!) and \over (which is how I left it) but then the phi became the top of the fraction. ggrrr! so I put it into two separate lines.

Any suggestions?

Bob

*Last edited by bob bundy (2011-10-14 01:51:33)*

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**Sarah Rebekah****Member**- Registered: 2011-09-25
- Posts: 540

its ok Bob

Love is the key to life

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

I am not sure what all this means.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,736

It means I can do this

Thanks

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**Sarah Rebekah****Member**- Registered: 2011-09-25
- Posts: 540

heheheheheheheh

Love is the key to life

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Will you explain the theorem?

'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'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,558

People will have to volunteer their birthdays ...

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

I think of it like this-every level of information I give out is a step closer to me. But, I am sure that if you searched through my posts you could find my birth date.

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

MIF wrote:

People will have to volunteer their birthdays ...

How can we get them to do that? Seems impossible.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

Nobody will be made into that. Thus the use of "volunteer".

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

Hi anonimnystefy;

Maybe about 5 members would go back and fill in their birthdate. That is probably not enough.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

I think it would be more,but you wouldn't be one of them.

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

Hmmmm. Who would believe it anyway?

**In mathematics, you don't understand things. You just get used to them.**

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**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 3,962

I could add credibility to your DOB by including it in your YOB puzzle, Bobby!

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,360

Hi;

Yes, you could. But who could solve it? I am still having major problems.

**In mathematics, you don't understand things. You just get used to them.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,736

But who could solve it?

Somewhere in the multiverse I have solved it. In fact I did it five years before it was set!

Unfortunately, I haven't found a way to communicate with any of the infinite number of other selves that exist in all these universes so I am unable to profit from this information in this universe.

The really annoying thing is: in at least one of those universes a 'Bob' has worked out how to communicate across universes. Why isn't he doing so?

Bob (this universe version)

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**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 3,962

Now, that's jolly interesting! It could very well explain the odd feeling I got when the person who solved my puzzle communicated their M solution to me. It seemed that they knew 'my' puzzle better than I did: that they might even be its *original *author, and that I, in this universe, am merely a subsequent author.

I may, then, have received a surreptitious www visit from another me! If we're a replication or a parallel existence of another life in some other universe within a multiverse, I'd draw the conclusion that one day I'll know much more M than I do now!!

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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