CoCoA:HowTo:Use Modular Numbers: Difference between revisions

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== Modular Numbers ==
=== Question ===
  Use R::=Z/(5)[x];
  5x+2y;
2y
---
  5=0;
FALSE :-((
---
Use R::=Z/(5);
=== Answer ===
   Type(5);
   Type(5);
INT
INT

Revision as of 14:40, 29 November 2005

Modular Numbers

Question

  Use R::=Z/(5)[x];
  5x+2y;
2y
---
  5=0;
FALSE :-((
---

Use R::=Z/(5);

Answer

 Type(5);

INT


5 e' un intero, e gli interi non dipendono dall'anello corrente (puoi immaginarti cosa succederebbe a un ciclo For?)

per vedere 5 come modulare devi fare:

 5 % 5;

0 % 5


(analogo al C) oppure immergerlo nell'anello di polinomi

 Use R::=Z/(5)[x];
 Poly(5);

0