Sentence examples for not always exists from inspiring English sources

Indeed, elementary arguments show that a classical solution not always exists already for (c=0), and one should in principle admit discontinuous solutions which satisfy the equation in a suitable weak sense, as was observed, e.g., in [8, 9].

The limits Kρ,ωmay not always exist, and necessary and sufficient conditions for their existence seem to be hard to find.

Surname recognition methods rely on low levels of interethnic marriages and the existence of distinctive surname nomenclatures (which do not always exist for some ethnic groups, eg, Black populations in the USA).

Administration officials acknowledged that such data did not always exist.

But like museums themselves, Old Master exhibitions have not always existed.

The mathematical solution of a control problem may not always exist.

Breeds as they are known today did not always exist, and many are of recent origin.

You could apply it to almost anything, any sort of situation or structure that exists and may not always exist".

Historical thought, turned on itself, shows that history has not always existed, nor is it found in every culture.

Their predictions now face a market discipline that did not always exist before the Internet came along.

And in a market where demand outstrips supply, the option to go elsewhere does not always exist.