weakening

views updated May 29 2018

weakening (monotonicity) A rule of reasoning that implies that from a clause such as P⇒Q (where ⇒ should be interpreted as “implies” and P and Q are atoms) one can deduce both P∨R⇒Q and P⇒Q∨R (where ∨ signifies “or”). In other words, additional antecedents can always be added to a clause in a deduction.

A Dictionary of Computing JOHN DAINTITH

weakening

views updated May 23 2018

weakening In synoptic meteorology, a decrease in pressure gradient around a pressure system over time. Changes of this kind bring about a weakening of the winds. See also intensification.

A Dictionary of Ecology MICHAEL ALLABY

weakening

views updated May 08 2018

weakening In synoptic meteorology, a decrease in pressure gradient around a pressure system over time. Changes of this kind bring about a weakening of the winds. See also INTENSIFICATION.

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY