My Grandfather: The Math Genius Who Fled the Nazis

Karl Gruenberg was a leading light in algebra, and I wish I knew him better.

Benny Carts
Human Parts
Published in
5 min readJul 13, 2023

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Photo from Wikipedia by Konrad Jacobs: Karl W. Gruenberg (center) with Kurt Hirsch (left) and Richard Bruck in 1960

Two years ago, I visited Vienna for the first time — the city of my ancestral roots and birthplace of my grandfather. But I wasn’t just there to soak in its abundance of culture. I’d gone to acquire Austrian citizenship.

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