In the paper the Einstein tensor for the metric which provides a conic motion is found. From the result it is concluded that the matter creating such metric is continuously spread in the universe.

Einstein’s equations were written for chalkboards and paper, yet they now sit at the heart of some of the most visually ...

One hundred years ago last month, a research paper appeared in the journal Zeitschrift für Mathematik und Physik, co-authored by a Swiss mathematician from ETH Zürich. Written with a physicist ...

Bulletin (Académie serbe des sciences et des arts. Classe des sciences mathématiques et naturelles. Sciences mathématiques), No. 20 (1995), pp. 51-59 (9 pages) An almost Hermitian manifold is ...

The geometry of spacetime forms the very foundation of modern gravitational theory, where the elegant interplay between curvature and matter is described by Einstein’s field equations. In this ...

Albert Einstein on a bill of 5 Israeli Pounds. A truly spectacular unpublished autograph manuscript produced by German physicist Albert Einstein (1879-1955) and exploring his celebrated Unified Field ...