A Proof of the Müntz–Szász Theorem
We give a proof of the Müntz–Szász theorem. The two halves use different ideas: Gram determinants for necessity, and the Riesz representation theorem together with the Blaschke ...
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2026
2026
Heller's Simple Proof of the Künneth Theorem
We present a short proof of the Künneth theorem due to Heller. We also include a short proof of the Eilenberg-Zilber theorem, which is needed for the topological examples, using...