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

You are not logged in.

- Topics: Active | Unanswered

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

Not exactly.

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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hmmmm. Them is fighting words where I come from.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,085

hi Stefy,

Been getting tools ready to do some real work this afternoon.

Stefy wrote:

But what are the privileges of defining 0.999... to "exist" as a mathematical concept and be equal to 1?

That's my whole point. Anyone can have their own mathematics just by defining it. If it is consistent and useful, others may adopt it too.

If it isn't useful, others will probably just ignore it.

If it's inconsistent, then lots of folk will tell you so.

Whatever, nobody has to use it if they think it is odd, poorly defined or just they don't understand it.

We've had a few of those on the forum recently.

Bob

Children are not defined by school ...........The Fonz

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

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

Hi Bob

True, true.

What kind of tools?

Hi bobbym

Look the phrase up.

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.

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,085

Saws, powered screwdriver, tape measure, sandpaper .... I'm repairing boxes that act as general purpose stage extensions. Roughly 800 (H) x 1200 x 1200. The side panels of some have developed holes.

Bob

Children are not defined by school ...........The Fonz

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

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Sorry, I gave up looking things up. I could not understand it anyway.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

Hi Bob

What do you need those for?

Hi bobbym

You should really look things up from time to time...

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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

I already know what it means because I have been wrongfully accused of doing that. If it were not you saying .99999999... ≠ 1, I would not be involved in the debate.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

I'm not actually saying that 0.999!=1, just that 0.999... should be barred.

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.

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,085

The boxes are quite big and strong enough to stand on. They are the same height as the school stage so they make the stage bigger. There are 6 boxes plus 4 staircases built to the same sizes. So you can arrange them in a variety of ways for shows to have centre stairs or side stairs or whatever. Once we arranged them out in a straight line from the stage and made a cat-walk for a fashion show.

But kids sit on them and swing their feet. Over time, some side panels have developed holes and once a small hole starts, some ***&&!! will manage to kick it bigger. gggrrrr!

One got large enough for a kid to climb inside the box. ?????

So I'm about to take off the damaged bits and saw up new panels to replaced them. Hopefully one afternoon's work. Then someone else is going to paint them black.

Bob

Children are not defined by school ...........The Fonz

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

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Yes, I will bar it immediately.

To me the algebraic idea, the geometric series and the fraction idea are enough. We numerical people do not have problems with .99999999... = 1.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,085

Stefy wrote:

I'm not actually saying that 0.999!=1, just that 0.999... should be barred.

You can bar it from your universe if you like but it's in mine and you cannot take it away!

Bob

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

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,037

Hope you get it finished today!

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.

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,085

Should do; if I get started. Sometimes I arrive to discover that a teacher wants to use the hall for some frivolous purpose like teaching children. Then I have to come back home and try again another day.

Bob

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

Offline

I have revived this debate here.

'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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Yep and it will get mighty hot.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

Yes, and initiating a hot debate is tempting

'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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

What is the purpose of that?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

I convinced Calvin 0^0 is 1

'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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Maybe you can convince Wolfram...

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline