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Addition in $ \mathbb {Z}$/p$ \mathbb {Z}$ or in $ \mathbb {Z}$/p$ \mathbb {Z}$[x] : +

+ adds two integers in $ \mathbb {Z}$/p$ \mathbb {Z}$, or two polynomials in $ \mathbb {Z}$/p$ \mathbb {Z}$[x]. For polynomials expressions, use the normal command to simplify.
For integers in $ \mathbb {Z}$/p$ \mathbb {Z}$, input :
Output :
For polynomials with coefficients in $ \mathbb {Z}$/p$ \mathbb {Z}$, input :
normal((11*x+5 )% 13+(8*x+6)%13)
normal(11% 13*x+5%13+8% 13*x+6%13)
Output :

giac documentation written by Renée De Graeve and Bernard Parisse