Inverse of a number (mod n)

[Ray Cross]

G'day,

Is there a simple Ti-Nspire entry method to evaluate the inverse of a number(mod n ) or is it necessary to write a 

program using Euler's algorithm or otherwise?

eg

Thanks,

Ray

Virus-free. www.avast.com

[Bert Wikkerink]

This function will do the job.

Bert Wikkerink

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Van: tins...@googlegroups.com <tins...@googlegroups.com> namens Ray Cross <cros...@gmail.com>
Verzonden: vrijdag 17 november 2017 6:15
Aan: tins...@googlegroups.com
Onderwerp: [tinspire] Inverse of a number (mod n)

 

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[Ray Cross]

Many thanks Bert.

Regards,

Ray Cross 

On 17 Nov 2017 6:55 PM, "Bert Wikkerink" <B.Wik...@csgliudger.nl> wrote:

This function will do the job.

Bert Wikkerink

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Van: tins...@googlegroups.com <tins...@googlegroups.com> namens Ray Cross <cros...@gmail.com>
Verzonden: vrijdag 17 november 2017 6:15
Aan: tins...@googlegroups.com
Onderwerp: [tinspire] Inverse of a number (mod n)

 

G'day,

Is there a simple Ti-Nspire entry method to evaluate the inverse of a number(mod n ) or is it necessary to write a 

program using Euler's algorithm or otherwise?

eg

Thanks,

Ray

Virus-free. www.avast.com

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[John Hanna]

To add a function to your numtheory file, open the file found in the MyLib folder. Add your function (to problem 1 in the doc) making sure to change the Library Access to LibPub (show in Catalog) when creating the function. Recompile (Check Syntax & Store) and test the function, then save the doc and Refresh Libraries. Your function should appear in the Catalog along with the rest of the numtheory functions.

 

If you’d rather not mess with a TI-supplied file, just create a new document and save it in the MyLib folder. Your file will then appear in the Catalog along with your functions in Problem 1 of the doc.

 

Regards,

     John

 

From: tins...@googlegroups.com <tins...@googlegroups.com> On Behalf Of Nicholas Cousar
Sent: Wednesday, August 14, 2019 6:04 PM
To: tinspire <tins...@googlegroups.com>
Subject: Re: [tinspire] Inverse of a number (mod n)

 

I've gotten more utility out of this function than anything in the numtheory\ library, so thank you for your service, Bert. Is there anyway I can add the inv_mod() function to the numtheory\ program library?

On Friday, November 17, 2017 at 3:55:48 AM UTC-5, Bert Wikkerink wrote:

This function will do the job.

 

 

 

Bert Wikkerink

 

---

Van: tins...@googlegroups.com <tins...@googlegroups.com> namens Ray Cross <cros...@gmail.com>
Verzonden: vrijdag 17 november 2017 6:15
Aan: tins...@googlegroups.com
Onderwerp: [tinspire] Inverse of a number (mod n)

 

G'day,

 

Is there a simple Ti-Nspire entry method to evaluate the inverse of a number(mod n ) or is it necessary to write a 

program using Euler's algorithm or otherwise?

 

eg

 

 

 

Thanks,

 

Ray

 

Virus-free. www.avast.com

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