It is therefore better to use some independent notation, such as A Z.
In the notation of the integral calculus, this area is equal to f x o udx; but the notation is inconvenient, since it implies a division into infinitesimal elements, which is not essential to the idea of an area.
There is a complete edition in modern notation by T.
These examples show that Napier was in possession of all the conventions and attributes that enable the decimal point to complete so symmetrically our system of notation, viz.
He prints a bar under the decimals; this notation first appears without any explanation in his "Lucubrationes" appended to the Constructio.