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Exact Solutions and Scalar Fields in Gravity - Instituto Avanzado de ...

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Prof. Dietrich Kramer: Brief Biography<br />

Dietrich Kramer was born <strong>in</strong> Weida, <strong>in</strong> a small <strong>and</strong> nice village <strong>in</strong><br />

Thur<strong>in</strong>gen, Germany. He studied Physics at the Friedrich Schiller University<br />

of Jena <strong>and</strong> got his Diploma <strong>in</strong> 1962, at the age of 22. In 1966<br />

he f<strong>in</strong>ished his Ph.D. at the same University, work<strong>in</strong>g <strong>in</strong> problems of<br />

bisp<strong>in</strong>ors <strong>in</strong> curved spaces.<br />

S<strong>in</strong>ce those years curved space–times <strong>and</strong> General Relativity have<br />

been his passions. In 1969 he published together with Gernot Neugabauer<br />

a paper <strong>in</strong> Annalen <strong>de</strong>r Physik (Leipzig), where the <strong>de</strong>f<strong>in</strong>ition<br />

of the Ernst potentials is given. They discovered <strong>and</strong> studied the potentials<br />

<strong>in</strong><strong>de</strong>pen<strong>de</strong>ntly at the same time as Fred Ernst did. These potentials<br />

are maybe one of the most important results of the last times <strong>in</strong> General<br />

Relativity<br />

The Annalen <strong>de</strong>r Physik Journal was not very well known at the time<br />

of the cold war, for this reason only few people were able to read the<br />

work of Kramer <strong>and</strong> Neugebauer. In this work, they proposed a method<br />

to generate exact solutions of the axially symmetric exterior fields of<br />

the E<strong>in</strong>ste<strong>in</strong> field equations, by us<strong>in</strong>g subgroups <strong>and</strong> subspaces of the<br />

whole isometry group of these space–times. Many other people all over<br />

the world <strong>de</strong>veloped later this method further. A lot of the well–known<br />

exact solutions of the E<strong>in</strong>ste<strong>in</strong> field equations can be generated us<strong>in</strong>g<br />

this elegant, powerful <strong>and</strong> simple method.<br />

Dietrich Kramer got his Habilitation <strong>in</strong> 1970 with the thesis: Invariantztransformationen<br />

strenger Vakumlösungen <strong>in</strong> <strong>de</strong>r allgeme<strong>in</strong>e Relativitätstheorie.<br />

In 1980, together with Hans Stephani, Malcolm Mac-<br />

Callum <strong>and</strong> Eduard Held, he wrote the historical monograph: <strong>Exact</strong><br />

<strong>Solutions</strong> to the E<strong>in</strong>ste<strong>in</strong> Field Equations, one of the most important<br />

books of General Relativity, <strong>in</strong>dispensable textbook for people work<strong>in</strong>g<br />

on Differential Geometry, curved spaces or partial differential equations<br />

connected with the E<strong>in</strong>ste<strong>in</strong> equations.<br />

In 1981, together with Gernot Neugabauer, Dietrich Kramer was<br />

awar<strong>de</strong>d with the price of the General Relativity Foundation. S<strong>in</strong>ce<br />

1992 he is Professor for Theoretical Physics <strong>in</strong> Gravitational Theory at<br />

Friedrich Schiller University of Jena. Among other positions, Dietrich<br />

Kramer has been Dean of the Institute for Theoretical Physics of the<br />

same University.<br />

Prof. Kramer has <strong>de</strong>livered <strong>in</strong>vited talks at many of the most important<br />

Universities <strong>and</strong> <strong>in</strong>ternational conferences of the world. He<br />

ma<strong>in</strong>ta<strong>in</strong>s good scientific relationships with other groups of relativity,<br />

<strong>in</strong> particular with groups <strong>in</strong> Madrid <strong>and</strong> <strong>in</strong> Mexico at C<strong>in</strong>vestav.<br />

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