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| | njwildberger.com
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| | We are supposed to have a very clear idea about the `laws of logic'. For example, if all men are mortal, and Socrates is a man, then Socrates is mortal. Are there in factsuch things as the "laws of logic"? While we can all agree that certain rules of inference, like the example above, are...
| | reasonableapproximation.net
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| | blog.sigfpe.com
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| | xorshammer.com
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| Nonstandard Analysis is usually used to introduce infinitesimals into the real numbers in an attempt to make arguments in analysis more intuitive. The idea is that you construct a superset $latex \mathbb{R}^*$ which contains the reals and also some infinitesimals, prove that some statement holds of $latex \mathbb{R}^*$, and then use a general "transfer principle"...