On Tue, 08 Apr 2025 17:00:48 GMT, Mr Flibble wrote:
It is correct to say that infinitesimals don't exist ...
Remember why “imaginary” numbers were called “imaginary”: because it was
assumed that, unlike “real” numbers, there was no way they could possibly relate to anything in the real physical world.
How wrong that turned out to be.
Infinitesimals are rather fundamental to calculus, or at least its
formulation using Leibniz notation. I have an Ian Stewart book somewhere
which, as I recall, mentioned some other real-world uses for them.
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