[sage-support] Re: Step by step result

2009-04-12 Thread mm

I am trying to do the same as Mathway, however, with a real step-by-
step result instead of redirected to a commercial software.  I want to
help high school and first year college students to learn math and I
want it to be based on Open Source technologies.  As long as there is
some ways to do it with Sage, I don't mind investing the time and
learn it.



On Apr 11, 11:38 am, ma...@mendelu.cz ma...@mendelu.cz wrote:
 On 11 Dub, 02:26, mabshoff michael.absh...@mathematik.uni-

 dortmund.de wrote:
  On Apr 10, 5:21 pm, kcrisman kcris...@gmail.com wrote:
  If I remember correctly Derive had such a step by step mode for
  various things like limits, integration and so on. Derive itself was
  killed as a product, so AFAIK you cannot buy it any more.

 The same is for exmaple in maple for derivatives and integrals, you
 can try it online athttp://cgi.math.muni.cz/~xsrot/int/uvod.cgi?cnt=yes
 The checkbox  Zobrazit postup výpočtu: means show steps.

 In Sage you can write some worksheets which solve selected typical
 problems, just like Maxima andhttp://user.mendelu.cz/marik/maw/od
 Mathematica andhttp://calc101.com/

 The following post could be also interestin for 
 you:http://thread.gmane.org/gmane.comp.mathematics.maxima.general/23736/f...

 Robert Marik



   Good luck!

   - kcrisman

  Cheers,

  Michael
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[sage-support] Re: Step by step result

2009-04-12 Thread mm

Thank you for this info, I will download and play around with it.  Too
bad it's not open source.

On Apr 10, 7:21 pm, kcrisman kcris...@gmail.com wrote:
 Incidentally, there *is* software which will do this and show step-by-
 step answers, including free software - I saw some demonstrated at the
 Joint Math Meetings, for instance seehttp://www.xyalgebra.org/index.html
 .  This is for a completely different audience than Sage, and is only
 free, not open source, but may be useful to you.  I believe it is only
 one of many such things, but it is the first one that came to mind.

 Good luck!

 - kcrisman
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[sage-support] Re: Step by step result

2009-04-12 Thread ma...@mendelu.cz

Hi, great idea, but remember that computer algebra systems use
slightly different way than humans to solve problems...

I think than more people work on something like this -- just guessing
from questions like
http://thread.gmane.org/gmane.comp.mathematics.maxima.general/23048/focus=23051
and
http://thread.gmane.org/gmane.comp.mathematics.maxima.general/9291/focus=9292

I am maintainer of MAW, Mathematical Assistant on Web, which *is*
opensource, see
the page at http://user.mendelu.cz/marik/maw/index.php?lang=enform=main
sources at http://mathassistant.cvs.sourceforge.net/mathassistant/
and perhaps the VMware virtual machine at 
http://user.mendelu.cz/marik/maw/offline.html

MAW can solve selected typical problems like evaluation of integral,
double integral, derivatives etc in steps.
The main idea is that the user input is processed in a worksheet.

So the worksheet for solving quadratic equations could look as folows
1. Get a,b,c
2. Print a*x^2+b*x+c=0
3. If b=0 convert into a*x^=-c, take square roots and finish
4. If c=0 convert into x*(a*x+b)=0, return answers and finish
5. Find b^2-4*a*c
6. Evaluate sqrt(b^2-4*a*c)
7. Find answers x_1,2=...

However, computers can never emulate the human approach. As an example
consider the problem to differentiate the function sqrt(x)*(x+1). Both
MAW and calc101.com use product rule to find derivative, but much
simpler is to multiply the parenteheses first and continue with sum
rule. The first way is computer way the second one is human way.
Similarly when differentiating something like (x^2+x+2)/(x^3)  ---
quotient rule is far more complicated than algebraic modification and
sum rule for derivatives.

You may be also interested in this post:
http://thread.gmane.org/gmane.comp.mathematics.maxima.general/20007/focus=20068


On 12 Dub, 20:15, mm haibho...@gmail.com wrote:
 I am trying to do the same as Mathway, however, with a real step-by-
 step result instead of redirected to a commercial software.  I want to

Steps from mathway were free for few weeks or months. I did not like
their output, it was too long, boring with long explanations for
trivial things.

Robert Marik

 help high school and first year college students to learn math and I
 want it to be based on Open Source technologies.  As long as there is
 some ways to do it with Sage, I don't mind investing the time and
 learn it.

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[sage-support] GCC for Mac OS X

2009-04-12 Thread pong

I wrote couple sage scripts and would like to compile them in Mac OS
10.5. Looks like I need GCC. How can I install one? A quick search on
the internet seems to suggest that I need to sign up as an Apple
Developer to get a copy which I don't feel comfortable to.

Thanks in advance
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[sage-support] Re: GCC for Mac OS X

2009-04-12 Thread mabshoff



On Apr 12, 8:42 pm, pong wypon...@gmail.com wrote:

Hi,

 I wrote couple sage scripts and would like to compile them in Mac OS
 10.5.

If you did write Sage code that is not Cython code you do not need any
compiler or am I misunderstanding you?

 Looks like I need GCC. How can I install one? A quick search on
 the internet seems to suggest that I need to sign up as an Apple
 Developer to get a copy which I don't feel comfortable to.

Unfortunately Sage will only build with Apple's gcc from XCode at the
moment. Other sources of gcc like Fink or MacPorts do not work (yet).

 Thanks in advance

Cheers,

Michael
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[sage-support] Re: GCC for Mac OS X

2009-04-12 Thread Tim Lahey

On Apr 12, 2009, at 11:42 PM, pong wrote:


 I wrote couple sage scripts and would like to compile them in Mac OS
 10.5. Looks like I need GCC. How can I install one? A quick search on
 the internet seems to suggest that I need to sign up as an Apple
 Developer to get a copy which I don't feel comfortable to.

The Developer tools are on the install DVDs. However, to keep up to  
date with the newer builds of the tools, you need to sign up for a  
free account on their developer site.

Cheers,

Tim.


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[sage-support] Re: GCC for Mac OS X

2009-04-12 Thread Crab

Thank you all for the quick replies. Yes, those are sage scripts but I
preparse them into .spyx files and hope them run a little faster after
compiling.

Alright, I will give ADC a try.


On Apr 12, 8:47 pm, mabshoff michael.absh...@mathematik.uni-
dortmund.de wrote:
 On Apr 12, 8:42 pm, pong wypon...@gmail.com wrote:

 Hi,

  I wrote couple sage scripts and would like to compile them in Mac OS
  10.5.

 If you did write Sage code that is not Cython code you do not need any
 compiler or am I misunderstanding you?

  Looks like I need GCC. How can I install one? A quick search on
  the internet seems to suggest that I need to sign up as an Apple
  Developer to get a copy which I don't feel comfortable to.

 Unfortunately Sage will only build with Apple's gcc from XCode at the
 moment. Other sources of gcc like Fink or MacPorts do not work (yet).

  Thanks in advance

 Cheers,

 Michael
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