Your use of the word "global" is truly discriptive, but I believe that perl documentation reserves it for package variables. A possible alternative is "file scope variable".

Example: The description of "our" in perlfunc contains the following quote.

our associates a simple name with a package (read: global) variable in the current package,...
Bill

In reply to Re^2: MCE seemingly stray array in sample code for Strassen's algorithm by BillKSmith
in thread MCE seemingly stray array in sample code for Strassen's algorithm by cormanaz

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