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IsArrCentral    --    checks if the arrangement is central


Syntax 
IsArrCentral(A: LIST): BOOL

Description
This function tests whether the arrangement is central from the list A of hyperplanes.

Example 
/**/ use QQ[x,y];	
/**/ A := [x, x-y, y];
/**/ IsArrCentral(A);
true

/**/ A := [x, x-1, y];
/**/ IsArrCentral(A);
false

See Also