English-French translations for filter

filtreNous savons que l’installation de filtres augmente les émissions de CO2. We know that installing filters increases the output of CO2. La plupart des parents ignorent que les filtres existent et qu'ils ont la possibilité de les utiliser. Most parents do not know that filters exist and that they have the possibility to use these filters. Le filtre est également efficace contre les sociétés qui utilisent des numéros de téléphone à tarif très élevé. The filter is also effective against firms using telephone numbers which charge very high call rates.
filtrer
L'eau est une bonne chose, mais si elle n'est pas propre, nous devons la filtrer. Water is good, but when it is not clean we must filter it.

A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another
Any item, mechanism, device or procedure that acts to separate or isolate
self-restraint in speech
A non-empty upper set which is closed under binary infima (a.k.a. meets
To sort, sift, or isolate
To diffuse; to cause to be less concentrated or focused
To pass through a filter or to act as though passing through a filter
To move slowly or gradually; to come or go a few at a time
To ride a motorcycle between lanes on a road

He runs an email filter to catch the junk mail
Hes got no filter, and hes always offending people as a result
The collection of cofinite subsets of ℝshould not be italicized is a filter under inclusion: it includes the intersection of every pair of its members, and includes every superset of every cofinite set.
If (1) the universal set (here, the set of natural numbers) were called a "large" set, (2) the superset of any "large" set were also a "large" set, and (3) the intersection of a pair of "large" sets were also a "large" set, then the set of all "large" sets would form a filter.

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