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#1 2014-04-08 22:41:11

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

Inequality Grapher

Made this (repurposed the Function Grapher): Inequality Grapher

How is it?

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

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#2 2014-04-08 23:10:00

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

Re: Inequality Grapher

Hi MIF;

Look like a really nice grapher. Very good.

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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#3 2014-04-08 23:12:42

ganesh
Registered: 2005-06-28
Posts: 24,639

Re: Inequality Grapher

Hi MathsIsFun,

The Inequality Grapher works very well!

Remarkable page!

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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#4 2014-04-09 00:12:55

bob bundy
Registered: 2010-06-20
Posts: 8,340

Re: Inequality Grapher

Hi MathsIsFun,

Love it.  Really useful!

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

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#5 2014-04-09 00:53:22

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

Very nice!

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#6 2014-04-09 09:54:22

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

Re: Inequality Grapher

Thanks Guys!

It should be possible to add more equations, I just need to do some tricky coding is all.

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

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#7 2014-04-09 10:25:42

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

Re: Inequality Grapher

Hi;

When you succeed it will be easy to create a graphic linear programming solver.

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 2014-04-10 12:36:21

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

Re: Inequality Grapher

Almost there ... is 3 enough? 4?

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

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#9 2014-04-10 12:47:36

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

Re: Inequality Grapher

Hi MIF;

I was thinking of 4. If 4 is possible then 4 is good.

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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#10 2014-04-11 20:55:17

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

Re: Inequality Grapher

4? You want 4? I think 4 is possible. 4 should definitely be possible. I will try for 4.

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

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#11 2014-04-12 00:19:17

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

Re: Inequality Grapher

Hi MIF;

4 would be good.

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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#12 2014-04-12 01:58:53

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,851
Website

Re: Inequality Grapher

This applet is really good. Never seen such a web resource before

'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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#13 2014-04-14 00:09:28

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

Re: Inequality Grapher

4? Was it 4 you wanted? Better than 4, I give you n: Inequality Grapher

(Use the +/- buttons below the y= ... and do a refresh if you can't see them.)

Hopefully I haven't wrecked it in the process, but I am sure you will all let me know if it still works nicely

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

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#14 2014-04-14 06:05:45

bob bundy
Registered: 2010-06-20
Posts: 8,340

Re: Inequality Grapher

Oh Joy!

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

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#15 2014-04-14 06:15:48

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

Re: Inequality Grapher

Axiom:More is better.

n is greater than 4 when n>4. This can be proved by induction. So, n is better than 4 when n>4. I am happy.

Worked on a whole bunch of linear programming problems and obviously could work on quadratic programming too.

Future suggestions:

How about showing the coordinates of the feasible points?
Depending on how you solved the problem this could be a hanger or it could be difficult.

All in all, very good work!

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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#16 2014-04-14 09:27:49

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

Re: Inequality Grapher

Love the screenshot!

Points: I can't think of a point-finding algorithm. But you can use the "Points" button and zoom in for more accuracy.

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

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#17 2014-04-14 10:45:51

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

Great work!

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