Software == maths?
Saying software is maths and should therefore not be subject to patents is a very broken argument.
Firstly, that Turing fellow also showed us software is equivalent to a mechanical widget and since mechanical items are patentable, so should software.
Secondly, the maths argument can be applied to anything. You can mathematically model any mechanical or chemical process.
It is hard to create a compelling case for software being treated differently.
The only logical outcome is to either allow software patents or do away with all patents. I'd rather the latter.