Definition:Immediate Successor Element

Definition
Let $\struct {S, \preceq}$ be an ordered set.

Let $a, b \in S$.

Then $a$ is an immediate successor (element) to $b$ $b$ is an immediate predecessor (element) to $a$.

That is, :
 * $(1): \quad b \prec a$
 * $(2): \quad \nexists c \in S: b \prec c \prec a$

That is, there exists no element strictly between $b$ and $a$ in the ordering $\preceq$.

That is:
 * $a \prec b$ and $\openint a b = \O$

where $\openint a b$ denotes the open interval from $a$ to $b$.

We say that $a$ immediately succeeds $b$.

Also see

 * Definition:Succeed
 * Definition:Strictly Succeed


 * Definition:Immediate Predecessor Element


 * Immediate Successor under Total Ordering is Unique
 * Non-Greatest Element of Well-Ordered Class has Immediate Successor