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.
Both branches make use of the fundamental notions of convergence of infinite sequences and infinite series to a well-defined limit. Generally, modern calculus is considered to have been developed in the 17th century by Isaac Newton and Gottfried Leibniz. Today, calculus has widespread uses in science, engineering and economics and can solve many problems that elementary algebra alone cannot. Calculus is a part of modern mathematics education. A course in calculus is a gateway to other, more advanced courses in mathematics devoted to the study of functions and limits, broadly called mathematical analysis. Calculus has historically been called the calculus of infinitesimals, or infinitesimal calculus.