Symbol for {reversal}: »
Reversal
of thermodynamically reversible changes
A thermodynamically reversible change is one that can be reversed by an infinitesimal modification of a variable.
[ reversibility ] < > [ equilibrium ]. Systems at equilibrium can easily undergo reversible change.
Elastic deformation
In the region of elastic deformation, strain is proportional to the stress
applied to a material and is reversible:
» :- (
of shape).
Deceleration
Deceleration is interpreted as {reversal} :- (acceleration.)
Negation
Negation, the logical operation on propositions, is interpreted as an instance of {reversal}, both internal and external negation.
Undoing
Undoing, in the 'Edit' mode of many computer programs, is an instance of »
Inversion (musical intervals)
The inversion of the interval C (lower pitch) - G (higher pitch) is G (lower
pitch) - C (higher pitch). »:-
(lower pitch, higher pitch)
(higher pitch, lower pitch).