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.

She is conducting research on the world's oldest profession.

He is interested in ichthyological research.

This area is rich in green tuff.

This area is rich in green tuff, forming a distinctive landscape.

Understanding the rules of 'Ha-gyou tenko' is difficult.

As soon as he arrived, he said 'I just got here.'

The Transmission Control Protocol is an important element for ensuring the reliability of data communication.

Let's split the check half and half.