condition

Condition or conditions may refer to:

In philosophy and logic

• Material conditional [实质条件], a logical connective used to form "if...then..." statements. The material conditional (also known as material implication, material consequence, or simply implication, implies, or conditional) is a logical connective (or a binary operator) that is often symbolized by a forward arrow "→".
• Necessary and sufficient condition, a statement which is true if and only if another given statement is true.

In computer science

• Conditions are a generalization of exceptions. When a condition arises, an appropriate condition handler is searched for and selected, in stack order, to handle the condition.
• Condition (SQL), a filtering mechanism in relational database queries. To SELECT one row of data from a table called tab with a primary key column (pk) set to 100 — use the condition pk = 100: SELECT * FROM tab WHERE pk = 100
• Condition variable, a synchronization primitive in concurrent programming. A condition variable is an object able to block the calling thread until notified to resume. The thread remains blocked until woken up by another thread that calls a notification function on the same condition variable object.

In medicine

• Medical condition, as a synonym for disease
• Medical state or condition, a patient's clinical status in a hospital

In numerical analysis

• The condition number of a function measures how much the output value of the function can change for a small change in the input argument. This is used to measure how sensitive a function is to changes or errors in the input, and how much error in the output results from an error in the input.

A conditioner is a liquid that you put onto your hair after washing it to make it softer; or a thick liquid which you can use when you wash clothes in order to make them feel softer. (American Equivalent: softener)

An air conditioner (AC) is a machine which keeps the air in a building cool and dry.

六级/考研单词: logic, implicit, seldom, arrow, necessity, suffice, compute, stack, filter, data, query, invariable, primitive, concurrent, thread, notify, resume, medicare, synonym, numerical, liquid, clothe, equivalent

充分必要条件 | Necessary and Sufficient Conditions