A virtual terminal can be abstract.Logical formLearned from2 sentences. A (syntax notation number) can be abstract.Logical formLearned from2 sentences. Persons may call abstract interpretation.Logical formLearned from2 sentences. Abstract (data types) can be built-in.Logical formLearned from2 sentences. Semantics can be abstract with respect to contextual equivalence.Logical formLearned from2 sentences. A tracking can be abstract.Logical formLearned from2 sentences. A localization can be abstract.Logical formLearned from2 sentences. (Control systems) can be abstract.Logical formLearned from2 sentences. An abstract machine can be formal.Logical formLearned from2 sentences. Persons may present an abstract model.Logical formLearned from2 sentences. An integer can be abstract.Logical formLearned from2 sentences. Coefficients can be abstract.Logical formLearned from2 sentences. Reference can be to abstract number.Logical formLearned from2 sentences. A (syntax representation) can be abstract.Logical formLearned from2 sentences. A piece can be constituted-of-or-filled-with abstract syntax.Logical formLearned from2 sentences.