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MyWikiBiz, Author Your Legacy — Monday November 25, 2024
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Also, <math>~E~</math> is not tubular at either <math>~X~</math> or <math>~Y,~</math> since there are nodes in both <math>~X~</math> and <math>~Y~</math> having incidence degrees greater than 1.
 
Also, <math>~E~</math> is not tubular at either <math>~X~</math> or <math>~Y,~</math> since there are nodes in both <math>~X~</math> and <math>~Y~</math> having incidence degrees greater than 1.
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Clearly, then, <math>~E~</math> cannot qualify as either a pre-function or a function on either of its relational domains.
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Clearly, then, the relation <math>~E~</math> cannot qualify as a pre-function, much less as function on either of its relational domains.
    
===Commentary Note 11.6===
 
===Commentary Note 11.6===
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