Adelfa: A System for Reasoning about LF Specifications

We present a system called Adelfa that provides mechanized support for reasoning about specifications developed in the Edinburgh Logical Framework or LF. Underlying is new logic named L_LF. Typing judgements LF are represented by atomic formulas L_LF and quantification permitted over contexts terms appear such formulas. Contexts, which constitute type assignments to uniquely variables modelled using technical device of nominal constants, characterized context schemas describe their inductive structure. these an associated semantics before sketching proof constructing arguments sound with respect semantics. then outline realization this illustrate its use through few example developments. conclude paper relating existing systems specifications.