How to define / create a new Ring

ring

asked 2015-03-24 08:58:46 +0100

LRM
35 ●3 ●5 ●12

Hi!

I just installed the version 6.5 of Sage. Then I saw in the help some page/tutorial about Basic Rings but I could not find an article (I googled) or an answer for the following:

How can I create a new ring? For example: How can I create a kind of ring of Integers (called ZZ in Sage) where I have only , say, even numbers?

Examples:

sage: sqrt(4) in myZZ True

sage: 3 in myZZ False

Thank you for any help!

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answered 2015-03-24 13:27:29 +0100

tmonteil
27413 ●31 ●204 ●517 http://wiki.sagemath.o...

You can have a look at this thematic tutorial that explains how to implement new algebraic structures in Sage.

To implement the in feature, you have to implement a __contains__ method.

Do not hesitate to post your preliminary code for more questions.

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I will take a look now. Thank you for your attention.

LRM ( 2015-03-25 15:33:02 +0100 )edit

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Asked: 2015-03-24 08:58:46 +0100

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Last updated: Mar 24 '15

How to define / create a new Ring edit