| Line 3,920: | 
Line 3,920: | 
|   | \\[6pt]  |   | \\[6pt]  | 
|   | & = &  |   | & = &  | 
| − | \text{the set of all ordered pairs in}~ L ~\text{incident with}~ u \in X.  | + | \text{the ordered pairs in}~ L ~\text{that are incident with}~ u \in X.  | 
|   | \\[9pt]  |   | \\[9pt]  | 
|   | L \star v  |   | L \star v  | 
| Line 3,930: | 
Line 3,930: | 
|   | \\[6pt]  |   | \\[6pt]  | 
|   | & = &  |   | & = &  | 
| − | \text{the set of all ordered pairs in}~ L ~\text{incident with}~ v \in Y.  | + | \text{the ordered pairs in}~ L ~\text{that are incident with}~ v \in Y.  | 
|   | \end{array}</math>  |   | \end{array}</math>  | 
|   | |}  |   | |}  |