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Erdős problem 3

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If A⊂NA \subset \mathbb{N} has ∑n∈A1n=∞\sum_{n \in A}\frac 1 n = \infty, then must A contain arbitrarily long arithmetic progressions?

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Where the source files it647 share a topic
Number Theory576Additive Combinatorics102Arithmetic Progressions27
Erdős problem 321accepted
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