July 2013
Intermediate to advanced
282 pages
6h 28m
English
Content preview from Good MathBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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27The Halting Problem
What better way to finish a book on computing than by asking if computations will ever finish?
One of the most fundamental questions in computing is, can you tell if a particular computation will ever stop? It’s obviously important to an engineer writing a program. A correct program should always eventually finish what it’s doing and stop. If you’ve written a program that doesn’t ever finish what it’s doing, it’s almost certainly incorrect.
There’s a lot more to this question than just whether or not a particular program is correct. It gets to the very heart of questions about the fundamental limits of mathematics.
Most of the time when mathematicians talk about the limits of math, they end up talking about something ...
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