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Filter regular sequences and endomorphisms of local cohomology modules

机译:过滤局部同学模块的常规序列和子元形

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Let R be a commutative Noetherian ring and a be an ideal of R such that cd(a, R)-grade (a, R) = 1, where cd (a, R) is the cohomological dimension of R with respect to a and grade (a, R) is the grade of a. We show that whenever, Ext(R)(j) (R-z, R) = 0 = Ext(R)(j) (R-z, H-a(N-1)(R)) for all z is an element of a and all integers i, j with i 0 and j = 0, then there exists an exact sequence 0 - Ext(R)(n) (H-a(n)(R), R) - End(R) (H-a(n)(R)) - End(R)(H-a(N-1)(R)) - Ext(R)(n+1)(H-a(n)(R), R) of endomorphisms of local cohomology modules, where n := cd (a, R) and, for z is an element of R, R-z is the ring of fractions of R with respect to multiplicatively closed subset {z(j)vertical bar j = 0} of R.
机译:让R是换向Neetherian环,A是R的理想,使得CD(a,r)-grade(a,r)& = 1,其中Cd(a,r)是r相对于r的协调尺寸 a和等级(a,r)是a的等级。 我们显示所有z的Ext(r)(j)(j)(rz,r)= 0 = ext(r)(j)(rz,ha(n-1)(r))是a和全部的元素 Integers I,J与I& 0和j& = 0,然后存在精确的序列0 - & ext(r)(n)(h-a(n)(r),r) - & 结束(r)(h-a(n)(r)) - & 结束(R)(H-A(N-1)(R)) - & ext(r)(n + 1)(n + 1)(ha(n)(r),r)的局部混沌模块的子元,其中n:= cd(a,r),并且对于z是r,Rz是z的元素 r相对于乘法闭合子集的r环R.

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