The Y doesn't stand for anything. It is part of the word RAY. In fact, the X doesn't stand for anything either. They were called x-rays because the type of radiation was unkno â¦ wn at the time. is added to make the name sound better. Megaman X, Sonic X, etcetera. It could stand for Extreme or something but that's looking a bit t â¦ oo much into it. 1  Cancers: X-Ray Identification of a Sarcoma Tumor In orthopedics, cancer is a serious issue because of the metastatic nature of cancerous malignancies.
Calculus is the study of how things change. It provides a framework for modeling systems in which there is change, and a way to deduce the predictions of such models. I have been around for a while, and know how things change, more or less.
A Brief History of Calculus. Calculus was created by Isaac Newton, a British scientist, as well as Gottfried Leibniz, a self-taught German mathematician, in the 17th century.It has been long disputed who should take credit for inventing calculus first, but both independently made discoveries that led to what we know now as calculus. Brief History of Calculus. Calculus was created by Isaac Newton, a British scientist, as well as Gottfried Leibniz, a self-taught German mathematician, in the 17th century.