Definition:Multiplication of Order Types

From ProofWiki
Jump to navigation Jump to search


Let $\struct {S_1, \preccurlyeq_1}$ and $\struct {S_2, \preccurlyeq_2}$ be ordered sets.

Let $\alpha := \map \ot {S_1, \preccurlyeq_1}$ and $\beta := \map \ot {S_2, \preccurlyeq_2}$ denote the order types of $\struct {S_1, \preccurlyeq_1}$ and $\struct {S_2, \preccurlyeq_2}$ respectively.

Let $\alpha \cdot \beta$ be defined as:

$\alpha \cdot \beta:= \map \ot {\struct {S_1, \preccurlyeq_1} \otimes^a \struct {S_2, \preccurlyeq_2} }$

where $\otimes^a$ denotes the antilexicographic product operator.

The operation $\cdot$ is known as order type multiplication or multiplication of order types.

The expression $\alpha \cdot \beta$ is known as the order product of $\alpha$ and $\beta$.


Multiplication of Order Types/Examples