A diagonal matrix is a matrix in which all elements outside the main diagonal are zero.

A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

Please put the book on the shelf above.

In addition, he can play the piano.

What is the unit of measure for this product's weight?

We have a 1on1 meeting every week.

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

He bought a new jacket.

My room is on top of the building.

This book is the first volume of a trilogy.