The phrase "an element at which" is correct and usable in written English.
It can be used in contexts where you are referring to a specific point or aspect related to an element in a discussion or analysis.
Example: "The study focuses on an element at which the chemical reaction occurs most efficiently."
Alternatives: "a point at which" or "a factor at which".
We know that best proximity point x for mapping T from A to B is defined as (d x,Tx)=d(A,B)) and a common best proximity point is an element at which both functions S and T attain their global minimum since (d x,Sx geq d(A,B)) and (d x,Tx geq d(A,B)) for all x.
The above optimization problem determines the smallest δ such that the box B δ (K0) contains an element at which ℛ is non-positive.
Let z be the (unique, by concavity of (t y))) element at which the maximum is realized in (3.1).
It is important to note that the subtle phenotypic effects of trait-associated variants discovered through GWAS should not be inferred as indicative of subtle effects of the regulatory element at which they reside.
Alcab has proposed introducing an element at A-level in which students must show knowledge and understanding of the culture and society of countries where the language is spoken and analyse works created in that language.
Briefly, a STOCSY spectrum was calculated as a symmetric matrix in which an element at position (i, j) is defined as a correlation coefficient between i-th and j-th bins in a set of 1D spectra (twelve spectra each acquired on an hourly basis).
A two-dimensional correlation map was calculated as a symmetric matrix using Spearman's rank correlation coefficient, in which an element at position (i, j) is defined as a correlation coefficient between the ith and jth positions in each set of 1D spectra of metabolites, microbial diversity of high-throughput sequencing and the amount of IgA.
"It is an attempt to locate the serial number on the weapon, and its caliber, using an element which at that time happened to be toilet paper".
The optimum concentration of zeolites in bioselective elements, at which the highest biosensor sensitivity was observed, was found to be 10%.
These antibodies were also used for chromatin immunoprecipitation (ChIP) to determine the sequence elements at which they are enriched (primer pairs Fig. 3B).
Perhaps the regions (e.g. centromeres or repetitive elements) at which G9a modulates H3K9me3 are not easily studied by ChIP-chip and/or they are not located on chromosome 19.
