In conclusion: In conducting an investigation of possible optimization by use of the &quot;study of variations&quot;, one must: Prove the validity of the working model (see paragraph 4 above).
(one; must Prove; the validity of the working model; L:In conducting an investigation of possible optimization by use of the &quot)
one
must Prove
the validity of the working model L:In conducting an investigation of possible optimization by use of the &quot