Graph theory is a branch of mathematics that studies mathematical structures called graphs.

Information theory is a field of study that mathematically analyzes the amount of information and the efficiency of its transmission.

Water turning into ice is an example of a phase transition.

I can't forget the day when I first shared an umbrella with him.

The Minister of Internal Affairs and Communications announced a new policy.

This electric motor is using three-phase power.

We are looking for new partnerships to strengthen our business contact.

Sotaro is my best friend.

In ancient Japan, the 方相 played an important role.

As the lunar phase changes, the night sky scenery also changes.