- 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.
- Bessel Fjord (Wikipedia)
Bessel Fjord is a fjord in northeastern Greenland. Administratively it belongs to the NE Greenland National Park area.