Alexander P. Yefremov is a Russian physicist

Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

, vice rector at Peoples' Friendship University of Russia

Peoples' Friendship University of Russia

The Peoples' Friendship University of Russia is an educational and research institution located in the South of Moscow and is ranked by the Ministry of Education of Russia as the country's third-best university after Moscow State University and Saint Petersburg State University...

 and director of its Institute of Gravitation and Cosmology.

He has worked at the Peoples' Friendship University of Russia (PFUR) since 1977, among others as its vice rector and head of its physics division.

Yefremov is known for his work in theoretical physics

Theoretical physics

Theoretical physics is a branch of physics which employs mathematical models and abstractions of physics to rationalize, explain and predict natural phenomena...

, among others, for his fundamental work on the role of quaternion

Quaternion

In mathematics, the quaternions are a number system that extends the complex numbers. They were first described by Irish mathematician Sir William Rowan Hamilton in 1843 and applied to mechanics in three-dimensional space...

geometry space in quantum mechanics and field theory.

Publications

Yefremov has authored more than 70 scientific publications in collections and journals.

Selected articles:

• A. P. Yefremov: The conic-gearing image of a complex number and a spinor-born surface geometry, Gravitation & Cosmology 17:1-6, 2011, arXiv:1102.0618v1 [math-ph], submitted 3. February 2011
• A. Yefremov, F. Smarandache, V. Christianto: Yang-Mills field from quaternion space geometry, and its Klein-Gordon representation, Progress in Physics, vol. 3, July 2007, pp. 42–50. Also in Florentin Smarandache (ed.): Hadron Models and Related New Energy Issues, InfoLearnQuest, 2007, ISBN 978-1-59973-042-4, p. 208–219
• A. Yefremov: Bi-quaternion square roots, rotational relativity, and dual space-time intervals, Gravitation & Cosmology, Vol. 13 (2007), No. 3 (51), pp. 178–184, Russian Gravitational Society, 2007
• A. P. Yefremov: Quaternions and Biquaternions: Algebra, Geometry and Physical Theories, arXiv:math-ph/0501055v1, submitted 21. January 2005

Books:

• “Quaternion spaces, frames of reference and fields”, Moscow, PFUR, 2005 (monograph)
• “Mechanics”, Moscow, PFUR, 2005 (in co-authorship)

External links

• Institute of Gravitation and Cosmology, Peoples' Friendship University of Russia
• Yefremov Alexander Petrovich, Institute of Gravitation and Cosmology of the Peoples' Friendship University of Russia (IGC PFUR)
• Research activity of IGC PFUR