# Hahn-Banach Theorem/Historical Note

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## Historical Note on Hahn-Banach Theorem

The Hahn-Banach Theorem was first proved by Eduard Helly in around $1912$, some $15$ years before Stefan Banach and Hans Hahn developed it independently.

This article is complete as far as it goes, but it could do with expansion.In particular: It seems Helly proved some special cases, then Hahn and Banach formulated it in its full generalityYou can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by adding this information.To discuss this page in more detail, feel free to use the talk page.When this work has been completed, you may remove this instance of `{{Expand}}` from the code.If you would welcome a second opinion as to whether your work is correct, add a call to `{{Proofread}}` the page. |