Delta (the symbol)

In mathematics and science, the Greek letter delta (Δ) typically represents a change or difference in a quantity. For example, Δx indicates the change in a variable x, meaning how much x has increased or decreased over a specific period or situation. It helps us compare initial and final values to understand the magnitude of change. Instead of focusing on the specific values, delta emphasizes the concept of variation or difference, making it a useful notation across fields like physics, engineering, and economics to quantify and analyze change.