Erdős problem 3 · problems.science

If $A \subset \mathbb{N}$ has $\sum_{n \in A}\frac 1 n = \infty$ , then must A contain arbitrarily long arithmetic progressions?

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Problem row: sha256:2351d5edbad5b2454c884a2526e13d677e2a060d37796e41a487b09913b96de0
Metadata: sha256:e027c403ee45e2b6acb70de972cc96a0e4e7a1eaec409eea7711280c0ae9f73c
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:d7e3668fa7eb41d572556132cb667bd41d54dfc7ac7949d964b94fd8990b9a94

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207