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Macaulay2Doc :: map(Ring,Matrix)

map(Ring,Matrix) -- make a ring map

Synopsis

Description

This is equivalent to map(ring m, R, m).
i1 : R = QQ[a..d];
i2 : S = QQ[s,t];
i3 : F = map(R,matrix{{s^4,s^3*t,s*t^3,t^4}})

               4   3      3   4
o3 = map(S,R,{s , s t, s*t , t })

o3 : RingMap S <--- R
i4 : kernel F

                        3      2     2    2    3    2
o4 = ideal (b*c - a*d, c  - b*d , a*c  - b d, b  - a c)

o4 : Ideal of R

See also