The phrase "which is proper" is a correct and usable phrase in written English.
It usually implies that something is the right or appropriate thing to do in a certain situation. For example: We should follow the etiquette which is proper for this occasion.
The justices insist on maintaining their independence, which is proper.
It insisted that bishops "are not to be regarded as vicars of the Roman Pontiff, for they exercise an authority which is proper to them," since "by divine institution…[they] have succeeded to the place of the apostles as shepherds of the Church" and are themselves, in fact, "the vicars and ambassadors of Christ".
The former would find in art all the rest of history (social conditions, biography of the artist, etc)., but would omit that part which is proper to art; the latter would judge the work of art in abstraction from history, depriving it of its real meaning and giving it an imaginary meaning or testing it by arbitrary standards.
Another is subordination [Unterordnung] which is proper inclusion, without reciprocity.
This paper discusses the renewable hybrid power creation system which is proper for Khalardda village placed in Odisha.
Al-Thagafi and Shahzad [5] gave a definition which is proper generalization of nontrivial weakly compatible maps which have coincidence points.
At such a time, the parson should not aspire to the judgements which are proper to the politician.
And at such a time, the parson should not aspire to the judgments which are proper to the politician; instead, this is a place for ordinary human compassion of the kind that is reconciling.
Let M ′ be the set of modules M ′ which are proper submodules or proper factor modules of modules in M. By assumption, there are only finitely many isomorphism classes of modules in M ′.
In especial, he distinguishes between predications in the categories of Substance, Quantity and Quality, which are proper and intrinsic, and those in the other six categories, excluding Relation, which he calls improper and extrinsic.
