My grandfather studied medicine at the Imperial University.

His first adjective is 'beautiful'.

Could you attend the meeting on my behalf?

Rino is my best friend.

His actions change depending on the circumstances.

In which direction is your house?

The result is certainly the result of his efforts.

My mother woke me up.

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

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