Gerhard Hessenberg

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Science and technology

Knowledge cost

2

Influence

3

Resistance

3

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What Wikipedia says

Gerhard Hessenberg (German: [ˈɡɛʁhart ˈhɛsn̩ˌbɛʁk]; 16 August 1874 – 16 November 1925) was a German mathematician who worked in projective geometry, differential geometry, and set theory.

Excerpt from the Wikipedia article “Gerhard Hessenberg”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Open Logic, Public domain, via Wikimedia Commons.