action
physical quantity of dimension energy × time
reduced Planck constant
physical constant, Dirac's constant: the Planck constant divided by 2 π; mathematical symbol h-bar ‹ℏ› (U+210F)
Holst action
formulation of the Palatini action for general relativity in terms of vierbeins by adding a Nieh–Yan topological term which does not alter the classical equations of motion as long as there is no torsion
grasping
act of taking, holding or seizing firmly with (or as if with) the hand
Planck constant
physical constant representing the quantum of action ; mathematical italic small h (U+210E), mathematical symbol ‹ℎ›
Luke's variational principle
action describing surface waves on a fluid with a free surface under the action of gravity
metachronal rhythm
movements produced by the sequential action (as opposed to synchronized) of structures
effective action
quantum corrected version of the classical action