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Written by Andrew Helwer on 2025-01-12 at 17:57

Am I remembering wrong or is there some particular popular essay on why constructive mathematics is the way to go? After working through a weird proof that uses the law of the excluded middle to pop a bunch of propositions into existence out of nowhere I am feeling sympathetic lol

[#]AskFedi #Constructivism

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Written by Jarrod Urban on 2025-01-12 at 20:18

@ahelwer no matter where in you go in mathematics you will not be able to avoid logic.

Do you mind sharing the proof you were working through?

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Written by Andrew Helwer on 2025-01-12 at 22:50

@jarrodu it's from page 102 of A Science of Concurrent Programs by Leslie Lamport (https://lamport.azurewebsites.net/tla/science-book.html).

It's an example of how to prove a statement in temporal logic, specifically a "leads to" statement where saying that P leads to Q is denoted P ↝ Q. Other important operators are always (□) and eventually (◇).

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Toot

Written by Jarrod Urban on 2025-01-13 at 06:32

@ahelwer I took a quick look. It is mostly logic. It would also take me some time to work through it.

Thanks for sharing. It has been a while since I thought about Lamport.

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Descendants