Sentence examples for become a basic problem from inspiring English sources

How to solve the variational inequality problems has already become a basic problem, and then several classical methods have appeared.

In the last four decades, since the time of the celebrated Hartman-Stampacchia theorem (see [2, 3]), the existence of a solution of a variational inequality, a generalized variational inequality, and other related problems has become a basic research topic which continues to attract the attention of researchers in applied mathematics (see for instance [4 13], and the references therein).

In the last four decades, since the time of the celebrated Hartman-Stampacchia theorem (see [1, 2]), the existence of a solution of a variational inequality and other related problems has become a basic research topic, which continues to attract attention of researchers in applied mathematics (see e.g., [3 14] and the references therein).

In the last four decades, since the time of the celebrated Hartman Stampacchia theorem (see [1, 2]), solution existence of variational inequality and other related problems has become a basic research topic which continues to attract attention of researchers in applied mathematics (see, e.g., [3 14] and the references therein).

This should become a basic principle when handling beta emitters.

A basic problem was Ms. Ripley's rudimentary guitar.

There's a basic problem with philanthropy.

The Higgs solves a basic problem in the standard model.

It's a basic problem about storytelling.

There is a basic problem emerging from this approach.

"There's a basic problem here with the U.S. strategy.