Present
By the end of the 20th century, classical mechanics in physics was no longer an independent theory. Along with classical electromagnetism, it has become imbedded in relativistic quantum mechanics or quantum field theory. It defines the non-relativistic, non-quantum mechanical limit for massive particles.
Classical mechanics has also been a source of inspiration for mathematicians. The realization that the phase space in classical mechanics admits a natural description as a symplectic manifold (indeed a cotangent bundle in most cases of physical interest), and symplectic topology, which can be thought of as the study of global issues of Hamiltonian mechanics, has been a fertile area of mathematics research since the 1980s.
Read more about this topic: History Of Classical Mechanics
Famous quotes containing the word present:
“America’s present need is not heroics but healing; not nostrums but normalcy; not revolution but restoration.”
—Warren Gamaliel Harding (1865–1923)
“The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside.”
—Sir Arthur Conan Doyle (1859–1930)
“In sum, all actions and habits are to be esteemed good or evil by their causes and usefulness in reference to the commonwealth, and not by their mediocrity, nor by their being commended. For several men praise several customs, and, contrarily, what one calls vice, another calls virtue, as their present affections lead them.”
—Thomas Hobbes (1579–1688)