Questions tagged [operational-semantics]

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What does ⊢ mean in operational semantics?

I have been reading a couple of texts on operational semantics. In [1], the evaluation of expressions is done as in this rule: $\frac{<e_1,s>\;\Rightarrow \;n_1\;\;\;<e_2,s>\;\Rightarrow ...
27
votes
1answer
7k views

Difference Between Small and Big-step Operational Semantics

What's the fundamental difference(s) between small and big-step operational semantics? I'm having a hard time grasping what it is and the motivation for having the two.
18
votes
2answers
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What is this fraction-like “discrete mathematics”–style notation used for formal rules?

In the paper "A Conflict-Free Replicated JSON Datatype", I encountered this notation for formally defining "rules": What is this notation called? How do I read it? For example: the ...
3
votes
1answer
67 views

What is the significance of ⟨B, s⟩ -> ⟨B', s'⟩ as the initial rule in this question about small-step semantics?

Revising for an exam and I'm trying to get to grips with operational semantics. Here's the exam question that prompted me posting this: Exam Question: We add to the language $\mathsf{SIMP}$ two new ...