Thomas J. Jech is a mathematician

Mathematician

A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

 specializing in set theory

Set theory

Set theory is the branch of mathematics that studies sets, which are collections of objects. Although any type of object can be collected into a set, set theory is applied most often to objects that are relevant to mathematics...

 who was at Penn State for more than 25 years. He was educated at Charles University (his adviser was Petr Vopěnka

Petr Vopenka

Petr Vopěnka is a Czech mathematician. In the early seventies, he established the Alternative Set Theory , which he subsequently developed in a series of articles and monographs...

) and is now at the Institute of Mathematics of the Academy of Sciences of the Czech Republic

Academy of Sciences of the Czech Republic

The Academy of Sciences of the Czech Republic was established in 1992 by the Czech National Council as the Czech successor of the former Czechoslovak Academy of Sciences. The Academy is the leading non-university public research institution in the Czech Republic...

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Jech gave the first published proof of the consistency of the existence of a Suslin line

Suslin's problem

In mathematics, Suslin's problem is a question about totally ordered sets posed by Mikhail Yakovlevich Suslin in a work published posthumously in 1920....

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With Karel Prikry, he introduced the notion of precipitous ideal. He gave several models where AC failed, for example one with ω₁ measurable

Measurable cardinal

- Measurable :Formally, a measurable cardinal is an uncountable cardinal number κ such that there exists a κ-additive, non-trivial, 0-1-valued measure on the power set of κ...

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External links

• Home page, with a copy at Penn state.