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:
“As regards the celebrated “struggle for life,” it seems to me for the present to have been rather asserted than proved. It does occur, but as the exception; the general aspect of life is not hunger and distress, but rather wealth, luxury, even absurd prodigality—where there is a struggle it is a struggle for power.”
—Friedrich Nietzsche (1844–1900)
“In the present civil war it is quite possible that God’s purpose is something different from the purpose of either party.”
—Abraham Lincoln (1809–1865)
“The present is the ever moving shadow that divides yesterday from tomorrow. In that lies hope.”
—Frank Lloyd Wright (1869–1959)