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## #1 2014-06-10 10:55:26

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Differential Equations - Introduction

A new page: Differential Equations - Introduction

Could you please go over this with a fine-tooth comb and find any inaccuracies. In my attempt to simplify I may have gone too far.

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

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## #2 2014-06-10 11:25:12

ganesh
Registered: 2005-06-28
Posts: 25,344

### Re: Differential Equations - Introduction

Hi MathsIsFun,

The page on Differential Equations is fabulous; the diagrams and literature are immaculate.

Thanks for the remarkable work!

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #3 2014-06-10 11:27:01

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

### Re: Differential Equations - Introduction

Hi MIF;

I thought the degree of an ODE was the power that the highest derivative was raised to. So the degree of

(near the bottom )

would be 1 not 2. Unless I am wrong about the definition.

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.

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## #4 2014-06-10 11:30:35

ShivamS
Member
Registered: 2011-02-07
Posts: 3,648

### Re: Differential Equations - Introduction

Great page, albeit a bit too oversimplified (in my opinion) but good for introductory purposes.

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## #5 2014-06-10 11:58:23

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,856
Website

### Re: Differential Equations - Introduction

Nice one. Thanks for putting it up.

'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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## #6 2014-06-10 12:13:14

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Differential Equations - Introduction

Thanks Guys!

bobbym wrote:

I thought the degree of an ODE was the power that the highest derivative was raised to.

Yes, will fix.

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

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## #7 2014-06-10 17:56:23

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

### Re: Differential Equations - Introduction

Hi;

You could use a good example problem?

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.

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## #8 2014-06-10 18:48:46

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Differential Equations - Introduction

Got a good one have you?

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

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## #9 2014-06-10 22:40:26

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

### Re: Differential Equations - Introduction

I did, but I do not remember much about it. The question was if the earth stopped dead in its orbit and was allowed to fall into the sun how long would it take? I remember spending a lot of time on small handheld programmable calculators numerically solving the DE. It is all better done with Kepler's laws and no calculus at all. Maybe someone else has a good example?

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.

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