# Leo Moser

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Leo Moser (April 11, 1921, Austria—February 9, 1970, Canada) was an Austrian-Canadian mathematician, known for polygon notation, which is called Steinhaus-Moser Notation and Moser's number.[1] His work is one of the first notations reaching $$f_{\omega}(n)$$, although the Ackermann function was older.

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