! , to occur in the function expression of the underlying function. Furthermore, we allow the function expression to contain functions given by two or more branches. By using interval arithmetic, second-order slope tuples provide verified enclosures of the range of the underlying function. We give some examples comparing range enclosures given by a second-order slope tuple with enclosures from ...

It is easy to write and verify real-time specifications with existing languages and methods; one just represents time as an ordinary variable and expresses timing requirements with special timer variables. The resulting specifications can be verified with an ordinary model checker. This basic idea and some less obvious details are explained, and results are presented for two examples.

Making AI more trustworthy with a formal methods-based approach to system verification and validation.