Albert Einstein’s

**Theory****of Relativity**encompasses two theories, namely Special**Relativity****Theory**and General**Relativity****Theory**. Special**Theory****Of Relativity**. Einstein first introduced this term in the year 1905. It is a theorem that deals with the structure of space-time. Einstein explained this**theory**based on two postulates –The

**theory**is based on the reformulation of general**relativity**known as Ashtekar variables, which represent geometric gravity using mathematical analogues of electric and magnetic fields. In the quantum**theory**, space is represented by a network structure called a spin network, evolving over time in discrete steps.**Lagrangian field theory**is a formalism in classical field**theory**.It is the field-theoretic analogue of Lagrangian mechanics.Lagrangian mechanics is used to analyze the motion of a system of discrete particles each with a finite number of degrees of freedom.Einstein in 1916, just after his completion of the general

**theory****of relativity**. The special**theory****of relativity**was a first step for Einstein. The fuller development of his goal of relativizing physics came with his general**theory****of relativity**. That**theory**was completed in its most important elements in November of 1915.**In a nutshell**, if the philosopher of linear cause and effect, Descartes said, "I think, therefore I am," then the philosophers of systems**theory**state "I relate, therefore I exist." There are many family theorists and schools of family therapy who have emphasized systemic and relational assessment and understanding, and often use genograms in ...Only a bit of the algebra of tensors is used; it is developed in about a page of the text. The book is for those seeking a conceptual understanding of the

**theory**, not computational prowess. Despite it's brevity and modest prerequisites, it is a serious introduction to the physics and mathematics of general**relativity**which demands careful study.L. Ryder,

**Quantum Field Theory**This elementary text has a nice discussion of much of the material in this course. A. Zee,**Quantum Field Theory****in a Nutshell**This is charming book, where emphasis is placed on physical understanding and the author isn’t afraid to hide the ugly truth when necessary. It contains many gems. M Srednicki, Quantum ...