
If P ⊆ Q P \subseteq Q are prime ideals in some ring R and if rank Q = rank ( Q / P ) + rank P + k Q = {\text {rank}}(Q/P) + {\text {rank}}\;P + k , then P ⊂ Q P \subset Q is said to be k-abnormal and k is called the degree of abnormality. The paper consists of two examples. The first example is a Noetherian integral domain in which the set of degrees of abnormality is unbounded. Let P be a prime ideal of R and set W = { Q / Q W = \{ Q/Q is a prime ideal and P ⊂ Q P \subset Q is abnormal}. The second example is a local domain such that { k | P ⊂ Q \{ k|P \subset Q is k-abnormal for some Q ∈ W } ≠ { k | P ⊂ Q Q \in W\} \ne \{ k|P \subset Q is k-abnormal for some Q minimal in W}.
Dimension theory, depth, related commutative rings (catenary, etc.), ABNORMAL, RANK OF IDEAL, Commutative Noetherian rings and modules
Dimension theory, depth, related commutative rings (catenary, etc.), ABNORMAL, RANK OF IDEAL, Commutative Noetherian rings and modules
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