Mr. Kramer is an old friend of mine.

I use a cleanser every night to remove my makeup.

This movie will be shown without credits.

He is an expert in Classical Chinese text studies, and is good at interpreting ancient Chinese literature.

She loves crème brûlée.

We should always remember the power of Kannon in difficult times.

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.

A skew-symmetric matrix has the characteristic that its transpose matrix is the inverse of the original matrix.