The phrase "a necessary function for" is correct and usable in written English.
It can be used when describing an essential role or purpose that something serves in a particular context.
Example: "The heart serves a necessary function for circulating blood throughout the body."
Alternatives: "an essential role in" or "a vital purpose for".
HR may be increasingly viewed with distrust as a "corrupt" agent of the corporation, but that view also undermines what is a very necessary function for a healthy workplace: a group of people who can facilitate the politics that will inevitably crop up in even the best corporate cultures.
Person identification is a necessary function in order for mobile service robots to locate the target person for those services.
We then provide an implementation of all necessary functions for handover operations supporting VoIP communication by using the proposed cross-layer architecture.
Most police officers are good people performing a dangerous and absolutely necessary function for society.
We have hybridized sex into such a finite cultural obsession when in actuality it is obviously the most necessary function for the survival of any species, from amoeba to human".
This also shows the necessary functions for the mobile computing, and the concept of this computer-aided engineering system.
The study was designed to produce structure switching aptamers, a necessary feature for riboswitch function and efficiently quantify this function using the dual color reporter system.
This role is still elusive but could reflect a necessary heterodimerization for receptor function as is observed for other GPCRs.
A necessary condition for the function (f_{a,b,c}(x)) to be completely monotonic on the interval ((0, infty)) is that -frac{1}{2}< ale0.
A necessary condition for the function (f_{a,b,c}(x)) to be completely monotonic on the interval ((0, infty)) is that begin{aligned}& b-a=frac{1}{2}, end{aligned} (2) begin{aligned}& 0< blend{aligned, end{aligned} (3) and cgelnsqrt{2pi}.
