https://www.hillelwayne.com/tags/ltl/ Recent content in Ltl on Hillel Wayne Hugo -- gohugo.io en-us Sun, 18 Apr 2021 00:00:00 +0000 https://www.hillelwayne.com/post/spec-composition/ Sun, 18 Apr 2021 00:00:00 +0000 https://www.hillelwayne.com/post/spec-composition/ Recently my friend Lars Hupel and I had a discussion on why formal methods don’t compose well. You can read the conversation here. We focused mostly on composing formally-verified code. I want to talk a little more about the difficulties in composing specifications. This is half because it’s difficult for interesting reasons and half because it’s a common question from beginners. Beginners to formal specification expect specifications should be organized like programs: multiple independent modules that interact through public interfaces, where the modules don’t know about each others’ private implementations.