Rare card
Riesz's lemma
- Value
- 50 W
- Attack
- 260
- Defence
- 208
- Players
- 0
In mathematics, Riesz's lemma (after Frigyes Riesz) is a lemma in functional analysis. It specifies (often easy to check) conditions that guarantee that a subspace in a normed vector space is dense. The lemma may also be called the Riesz lemma or Riesz inequality.
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