We know that the extension $F(A)/F$ where $A$ is finite is the set of all rational functions with $Card(A)$ variables.
What is the form of an element in $F(A)$ if we assume that $A$ is countably infinite?
We know that the extension $F(A)/F$ where $A$ is finite is the set of all rational functions with $Card(A)$ variables.
What is the form of an element in $F(A)$ if we assume that $A$ is countably infinite?
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