Max DehnBirth Chart
Max Wilhelm Dehn
13/11/1878 12:00
AA - Birth record in hand
St. Pauli
Germany
53°33' ↑ North - 9°59' → East
00:40 East
Sun Moon Asc
Photo: Reproduction
Max Wilhelm Dehn was a German mathematician whose work had a lasting impact on geometry, topology, and geometric group theory. A student of David Hilbert, Dehn rose to prominence in 1900 by solving Hilbert’s third problem, introducing what became known as the Dehn invariant. During the first decades of the twentieth century he proposed fundamental methods and concepts: Dehn’s algorithm, the notion of the Dehn function, Dehn surgery, and results that broadened the understanding of manifolds and groups.
His work in combinatorial topology includes, together with Poul Heegaard, one of the earliest texts on the foundations of analysis situs, as well as contributions to homology and the study of knots, such as distinguishing the left- and right-handed trefoils. In group theory he formulated the word problem (the so-called Dehn problem), which became central to the field.
A professor in Münster and later in Frankfurt, Dehn trained and influenced generations of mathematicians and scientists, holding seminars that attracted figures such as André Weil and Carl Ludwig Siegel. Persecuted by the Nazi regime, he was forced to leave Germany in 1939 and completed his career in the United States, where he also taught at institutions including Black Mountain College. Numerous mathematical concepts bear his name, reflecting his theoretical and pedagogical legacy.
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