In this graph, 𝑥 and 𝑦 are directly proportional. This means that when 𝑥 doubles, 𝑦 also doubles, and when 𝑥 triples, so does 𝑦. In fact, for all coordinates on this line, you could multiply or ...

In the context of inverse problems, a mathematical model of the measurements is called the direct problem. To understand this term, let us consider a model for obstetric sonography. An ultrasonic ...

Perhaps oligarchs facing the loss of their superyachts to sanctions might draw comfort from what my late father, a highly experienced sailor, used to tell me — that the pleasure derived from owning a ...