Heinz Bachmann
Heinz Bachmann (born 1924) is a mathematician who worked at the Eidgenössische Sternwarte (federal observatory) in Zurich. He introduced the Bachmann-Howard ordinal and ordinal collapsing functions.
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Wikipedia
Heinz Bachmann (born 1924) is a mathematician who worked at the Eidgenössische Sternwarte (federal observatory) in Zurich. He introduced the Bachmann-Howard ordinal and ordinal collapsing functions.