Please take a look at this artwork.

We divided the work to move the project forward.

He is a world-renowned ichthyologist.

Xun inhaled the smoke and thought deeply.

He was selected as the leader of the project because of his exceptional abilities.

Shingo is my best friend.

I always have candy in my pocket.

A positive-definite matrix is an important concept in linear algebra.

A positive-semidefinite matrix is one of the important concepts in linear algebra.

In linear algebra, triangular matrices play a very important role.