- Dec 31 Thu 2015 10:52
- Dec 29 Tue 2015 15:21
Covariance and Contravariance describe how the quantitative description of certain geometric or physical entities changes with a change of basis. They are the mathematical foundation to understand General Relativity.
【James Joseph Sylvester（1814－1897）】
The terms Covariant and Contravariant were introduced by James Joseph Sylvester in 1853 to study algebraic invariant theory. Now they are extensive using in Tensor Field analysis of mathematics, physics, and engineering, even in General Relativity. In order to understand what Covariance and Contravariance are in a vector space, in the beginning, a vector can be written as
- Dec 15 Tue 2015 12:42
Physics derive: OB Tsai Write & Edit: BMC
The study of the motion is an ancient one, making Classical Mechanics one of the oldest and largest subjects in physics. It is also widely known as Newtonian Mechanics. The initial development of Classical Mechanics is often referred to as Newtonian Mechanics, with the mathematical methods invented by Isaac Newton. The most famous equation is known as Newton's Second Law of Motion.
- Dec 06 Sun 2015 22:03
- Dec 05 Sat 2015 01:07