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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

*Note: This math tool is for educational/academic purposes to solve larger scale math problems.

My friends and I are working on a public mobile computing platform that could be of interest to this community.

The URL is at: **rapidcalculator.com**

RapidCalculator.com is a free mobile large-scale computing platform (this is like a heavily souped up TI-83 or TI-89). We create the capability for users to perform heavy calculations on the web or on their mobile devices.

Perform intensive math/science/engineering calculations, matrix operations like multiplication/inverses, plot graphs of functions, operations on polynomials like multiplication/differentiation/integration, evaluate Fast Fourier Transforms, manipulate complex numbers and much more! Does not require any installation or plugin.

This tool is currently still under continuous development and enhancement (this is our first stable release), and we appreciate your feedback! Let us know what math functions that we should add, and what features would generally be useful for scientists/engineers/students/teachers. If it is feasible we will try to program it in. We are continuously adding new technical functions.

To start you guys off, as an initial math exercise you could perhaps do the following computation

, which is tedious by hand, but in RapidCalculator you will just type the command:poly_x[(cos(x)^3+sin(6*x)^5+1/log(x)^2).ddiff{x,20}]

and see the results! A lot of other larger-scale calculations not possible on your graphing calculators/mobile devices will be possible on our computing platform.

Thanks, and we appreciate feedback!

*Last edited by gauss_infinity (2012-11-01 14:32:24)*

rapidcalculator.com - A powerful mobile computing platform for math and science

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

Welcome to the forum. Nice work! it could use multiprecision floating point.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

Hi Bobbym,

Thanks for your recommendation and encouragement! yes, we have put your suggestion for the floating point precision on our to-do list. We hope the users of this forum would benefit from this powerful math platform!

Again, the link is at rapidcalculator.com

and our facebook page is at facebook.com/ProAlgorithms where we will be posting all updates to the platform.

Once again, thanks to everyone who tried it! Math on!

rapidcalculator.com - A powerful mobile computing platform for math and science

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

What are you coding in?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

hi Bobbym;

we are coding in php and C++

rapidcalculator.com - A powerful mobile computing platform for math and science

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

Very good. You have come a long way with it already.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

**rapidcalculator.com**

We added some new useful math functions:

1) Ability to define multinomial functions (maximum number of variables is 26 if you use all the single letter alphabets)

2) Ability to perform operations on these functions like derivatives, integrals, partial derivatives, partial integrals

3) Cleaning up of some notation, for example previously for sine you have to type the command _sin(), but now you can just use sin()

4) Improved performance and display

Check out our computing platform at rapidcalculator.com

*Last edited by gauss_infinity (2012-11-01 14:32:43)*

rapidcalculator.com - A powerful mobile computing platform for math and science

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

0^0 returns 1 for some reason...

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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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

Hi anonimnystefy,

Thanks for trying the computing platform. yea, 0^0 should be indeterminate form, however we default anything to the power of zero to be one, so the final answer is 1.

We hope this computing platform is useful to math students and teachers alike!

math on!

try it at rapidcalculator.com

rapidcalculator.com - A powerful mobile computing platform for math and science

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

Okay. I was also wondering if you are planning on doing something like sums?

*Last edited by anonimnystefy (2012-10-31 11:44:51)*

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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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

Hi anonimnystefy,

sums of what? If you can give some examples we can try to program it in if it is feasible

Thanks!

_______

rapidcalculator.com

*Last edited by gauss_infinity (2012-10-31 11:54:38)*

rapidcalculator.com - A powerful mobile computing platform for math and science

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

Well, for example, if something like sum(expression,i,a,b) was entered it would return:

.Also a nice thing to have would be a function that returns the coefficient of a certain power of a certain variable in a certain polynomial. E.g.:

For x^2*y+2*x*y^2+100 and variable y to the power 2, it would return 2*x.

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: 104,727

Hi gauss_infinity;

Yes, some summation would be nice.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

One more thing would be to be able to plot a one variable polynomial in any specified (one letter) variable.

Also,the message outputed when an erronous input is given is kinda... not very well put together,though that's just a minor aesthetic thing.

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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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

Hi all,

Sure! Thanks for all the input...we will try to address these in our next revision of the platform.

______________

rapidcalculator.com

rapidcalculator.com - A powerful mobile computing platform for math and science

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

It is a lot of work even for a couple of guys. So far you have done well.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

Thank you. I wish you the best in your project. How many of you are working on it?

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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**gauss_infinity****Member**- Registered: 2012-10-23
- Posts: 25

Hi anonimnystefy and bobbym,

Two of us are working on it now. And thanks for the suggestions from both! We will keep you guys posted.

__________

rapidcalculator.com - Try out our mobile computing platform for math/science

*Last edited by gauss_infinity (2012-10-31 14:45:56)*

rapidcalculator.com - A powerful mobile computing platform for math and science

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

Wow, all that work for just two guys! Anyway, keep up the food work!

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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Is

undefined? Why?'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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

0^0 is 1.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

Hi;

0^0 is 1. It is sometimes defined as indeterminate but mostly you will see it as 1.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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What would be the logic to take it as indeterminate?

'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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,727

I believe some books point out that

x^0 and 0^x have different limits as x approaches 0.

But most mathematicians agree that 0^0 = 1 is more useful so they define it like that.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

0^0 as indeterminate is more useful when you define x^0 to be x/x, because 0/0 is indeterminate.

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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