The mathematical equations were very intriguing and thought-provoking, making me want to continue striving for better knowledge of this novel, as well as the vast world of number theory. The professor's field of research was number theory. He is no longer able to actively research this topic due to his brain damage. A single mother, the housekeeper, has been hired by an agency to take care of a new client, the old professor. After learning that the housekeeper has a son, "Root", the professor insists that she come every day after school. The housekeeper noted, “An endlessly scrolling number and another vague figure that never revealed its true nature now traced a short, elegant trajectory to a single point. Although there was no circle in evidence, (pie) had come down from somewhere to join and. There they rested, slumped against each other, and all a human had to do was add 1, and the world suddenly changed. Everything ended in nothingness, in zero." (Ogawa, 127). Together they all bonded over math and baseball, going to baseball games to celebrate wins and birthdays. This ties into one of the main themes of the novel, which is how the family isn't always together