How real are the real numbers, really?

The video explores Achilles' journey through fractions, highlighting the concept of infinity. It delves into the nature of fractions, irrational numbers, and real numbers, explaining their importance in mathematics. The video discusses calculating speed using infinitesimals and the role of real numbers in calculus. It concludes with the introduction of hyper-reals and a segue into astrophysics, questioning the infinity of the universe.

What is the significance of Achilles running through every fraction of the distance?

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How does the concept of infinity play a role in Achilles' movement?

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What are irrational numbers and how do they relate to fractions?

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What is the relationship between real numbers and the concept of gaps in numbers?

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Explain the process of calculating Achilles' speed using infinitesimals.

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Discuss the historical context of how mathematicians dealt with infinitesimals.

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What conclusion can be drawn about the existence of numbers in the universe?

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