3 papers
math.HO2025
Visualize Geometric Series
Hung Viet Chu
We review Mabry's, Edgar's, and the Viewpoints 2000 Group's proofs without words for the geometric series formula. Mabry and Edgar proved without words that $$\frac{1}{4} + \left(\…
math.GM2025
Squaring the Circle Revisited
Hung Viet Chu
Squaring the circle is impossible, but it can be squared approximately. Ramanujan gave a construction correct to eight decimal places. In his book Mathographics, Dixon gave constru…
math.FA2024
Strong Partially Greedy Bases with respect to An Arbitrary Sequence
Hung Viet Chu
For Schauder bases, Dilworth et al. introduced and characterized the partially greedy property, which is strictly weaker than the (almost) greedy property. Later, Berasategui et al…