[isabelle-dev] NEWS (constant ii)

[Lawrence Paulson]

* Renamed ii to imaginary_unit in order to free up ii as a variable name. 
The syntax \<i> remains available.
INCOMPATIBILITY.

To my surprise, there are thousands of occurrences of ii throughout the library than the AFP. The overwhelming majority of these have nothing to do with the complex numbers. Therefore it is highly likely that I have overlooked a few that are. But anyway, the repository builds.

Larry