Boris Tsirelson is confirmed dead at the age of 69.

Boris was best known as a Russian-Israeli mathematician.

RIP Boris Tsirelson @TheTweetOfGod #TragicDeaths šš #BorisTsirelson add some flowers to their gravestone at

RT @wtgowers: I've just learnt the sad news that the mathematician Boris Tsirelson died in January, aged 70. Of his many achievemā¦

And this blogpost of his is fascinating:"I observe that my achievements in mathematics are greater than my strengthā¦

RT @wtgowers: I've just learnt the sad news that the mathematician Boris Tsirelson died in January, aged 70. Of his many achievemā¦

RT @NGhoussoub: I just saw this sad news. Boris Tsirelson was an amazingly innovative mathematician. Besides his work on Banach spaā¦

RT @wtgowers: I've just learnt the sad news that the mathematician Boris Tsirelson died in January, aged 70. Of his many achievemā¦

I just saw this sad news. Boris Tsirelson was an amazingly innovative mathematician. Besides his work on Banach spaā¦

RT @postquantum: "Envy me, I am very lucky. I am comfortably leaving during a peak of fame." -- Boris Tsirelson, January 20, 2020

RT @postquantum: "Envy me, I am very lucky. I am comfortably leaving during a peak of fame." -- Boris Tsirelson, January 20, 2020

Boris Tsirelson | |
---|---|

Boris Tsirelson while a first-year student, in 1967 | |

Born | Leningrad, Soviet Union | May 4, 1950

Died | January 21, 2020 Basel, Switzerland | (aged 69)

Known for | Tsirelson's bound Tsirelson space Tsirelson drift Gaussian isoperimetric inequality |

Scientific career | |

Thesis | General properties of bounded Gaussian processes and related questions (1975)^{[1]} |

Doctoral advisor | Ildar Ibragimov |

Contents

1 Biography

2 Contributions to mathematics

3 References

4 External links

Biography

Tsirelson was born in Leningrad to a Russian Jewish family. From his father Simeon's side, he is the great-nephew of rabbi Yehuda Leib Tsirelson, chief rabbi of Bessarabia from 1918 to 1941, and a prominent posek and Jewish leader. He obtained his Master of Science from the University of Leningrad and remained there to pursue graduate studies. He obtained his Ph.D. in 1975.

Later, he participated in the refusenik movement, but only received permission to emigrate to Israel in 1991. Since then, he has been a professor at Tel-Aviv University.

In 1998 he was an Invited Speaker at the International Congress of Mathematicians in Berlin.

Contributions to mathematics

Tsirelson has made notable contributions to probability theory and functional analysis. They include:

Tsirelson's bound, in quantum mechanics, is an inequality, related to the issue of quantum nonlocality.

Tsirelson space is an example of a reflexive Banach space in which neither a lĀ p space nor a c0 space can be embedded.

The Tsirelson drift, a counterexample in the theory of stochastic differential equations.

The Gaussian isoperimetric inequality (proved by Vladimir Sudakov and Tsirelson, and independently by Christer Borell), stating that affine halfspaces are the isoperimetric sets for the Gaussian measure.

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