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Research: 0.999...99 vs 0.999...

Real Analysis

Status: Open.

#5 In yaobinwen/Robin-on-Math;

· yaobinwen opened on Apr 2, 2026

Learn some basic fractal geometry (分形几何)

Status: Open.

#4 In yaobinwen/Robin-on-Math;

· yaobinwen opened on Feb 13, 2026

Study the PKU open course: Mathematical Analysis I (course in Chinese)

Real Analysis

Status: Open.

#3 In yaobinwen/Robin-on-Math;

· yaobinwen opened on Jan 25, 2026