BIRTHDAY
1997
Springer
14 years 3 months ago
1997
Springer
We compare the expressive power on finite models of two extensions of first order logic L with equality. L(Ct) is formed by adding an operator count{x : ϕ}, which builds a term ...
TACAS
2009
Springer
14 years 6 months ago
2009
Springer
We discuss the problem of path feasibility for programs manipulating strings using a collection of standard string library functions. We prove results on the complexity of this pro...