- Derivative (Wikipedia)
In mathematics, the derivative shows the sensitivity of change of a function’s output with respect to the input. Derivatives are a fundamental tool of calculus. For example, the derivative of the position of a moving object with respect to time is the object’s velocity: this measures how quickly the position of the object changes when time advances.
Stanford Encyclopedia of Philosophy
- Stoicism (plato.standford.edu)
Stoicism was one of the dominant philosophical systems of the Hellenistic period. The name derives from the porch (stoa poikilê) in the Agora at Athens decorated with mural paintings, where the first generation of Stoic philosophers congregated and lectured. The school of thought founded there long outlived the physical Athenian porch and notably enjoyed continued popularity in the Roman period and beyond. This entry introduces the main doctrines and arguments of the three parts of Stoic philosophy – physics, logic, and ethics – emphasizing their interlocking structure. We also review the history of the school, the extant sources for Stoic doctrine, and the Stoics’ subsequent philosophical influence.
- Stoicism (Wikipedia)
Stoicism is a school of Hellenistic philosophy that flourished in Ancient Greece and Ancient Rome. The Stoics believed that the practice of virtue is enough to achieve eudaimonia: a well-lived, flourishing life. The Stoics identified the path to achieving it with a life spent practicing certain virtues in everyday life such as courage or temperance and living in accordance with nature. It was founded in the ancient Agora of Athens by Zeno of Citium around 300 BC.