RE: [tlaplus] Re: Draft of New TLA Book

Hi Sergey,

Thanks for pointing out the typo. If you find other errors, please include the version date of the copy you are referring to.

Cheers,

Leslie Lamport

From: tlaplus@xxxxxxxxxxxxxxxx <tlaplus@xxxxxxxxxxxxxxxx> On Behalf Of Sergey Bronnikov
Sent: Sunday, January 14, 2024 8:28
To: tlaplus <tlaplus@xxxxxxxxxxxxxxxx>
Subject: [tlaplus] Re: Draft of New TLA Book

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Hi, Leslie!

Thanks for the book!

There is a typo in "4.2.5.3 Proving Liveness" (p. 132):

> Since Λ equals 2Λ, and once 2Λ is true it is true forever, this formula is equivalent to Λ ∧ G ; H 1 ∨ . . . ∨ H j.

> (This follows from (3.32c).and propositional logic.)

seem there is an extra dot before "and"

Sergey

среда, 3 января 2024 г. в 22:14:24 UTC+3, Leslie Lamport:

On Wednesday, January 3, 2024 at 10:14:24 PM UTC+3 Leslie Lamport wrote:

A draft of a new book I have tentatively titled A Science of Concurrent Programs is available here. The book explains the scientific principles underlying the TLA+ language. It contains a lot of math. All the math beyond high school algebra is explained, but it will be tough going for readers who haven't taken an introductory university math class for computer science students that covers things like sets and logic. The book contains little discussion of how TLA+ is used in practice, but it explains why TLA+ is what it is.

This is a preliminary version and I welcome comments, suggestions, and questions. Anyone who is the first to report any error will be thanked in the final version.

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