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Hermann Minkowski joined space and time into spacetime

In a 1908 lecture Hermann Minkowski, once Einstein's teacher, showed that relativity is best understood in a single four-dimensional 'spacetime', the language of modern physics.

Hermann Minkowski
Hermann Minkowski · 1864–1909
Person
Hermann Minkowski
Lived
1864–1909
Field
Mathematics
From
German

The story

Hermann Minkowski was born on 22 June 1864 in Aleksotas, then in the Russian Empire and now part of Kaunas in Lithuania. His parents, Lewin Boruch Minkowski, a merchant who helped fund the choral synagogue in Kovno, and Rachel Taubmann, were Jewish. To escape persecution of Jews in the Russian Empire, the family moved to Königsberg in 1872. His older brother Oskar became a noted medical researcher.

Minkowski became one of the leading mathematicians of his age. He shared the Paris Academy's Grand Prix at 18, created the geometry of numbers, and taught at Bonn, Königsberg, Zurich and, from 1902, Göttingen. At the Zurich Polytechnic the young Albert Einstein attended several of his courses.

Einstein's special theory of relativity of 1905 showed that space and time measurements depend on motion, but it still treated them as separate quantities. By 1907 Minkowski realised that the theory could best be understood in a four-dimensional geometry in which space and time are joined into a single continuum, now known as Minkowski spacetime. He reformulated Einstein's theory in this language, a step Einstein at first did not think much of.

He presented the idea in a famous lecture, Raum und Zeit (Space and Time), on 21 September 1908 at the 80th Assembly of German Natural Scientists and Physicians in Cologne. He told his audience that from then on space by itself and time by itself would fade into mere shadows, and only a union of the two would remain independent. The lecture was published in 1909. Minkowski did not live to see its influence: he died of appendicitis in Göttingen on 12 January 1909, aged 44. Hilbert remembered him as his best and most dependable friend.

His geometric picture provided the framework for all later mathematical work on relativity, and Einstein built on it in developing general relativity. Historians note that Minkowski, together with Hilbert, helped change Einstein's view of mathematics from a mere tool into a source of creative insight. The asteroid 12493 Minkowski is named in his honour.

Why it matters

Spacetime geometry gave physicists the mathematical framework for relativity and remains the language physicists use to describe space, time and motion.

About Hermann Minkowski

Mathematician who taught the young Einstein and in 1908 fused space and time into a single four-dimensional “spacetime”, the geometry on which relativity still rests.

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Hermann Minkowski
1864–1909 · Mathematics
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Another act of tikkun olam. This is part of tikkun olam, the Jewish idea of repairing the world, and every one of us can add to it.

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