Differential equations are fundamental tools in physics: they are used to describe phenomena ranging from fluid dynamics to general relativity. But when these equations become stiff (i.e. they involve ...

Master problem-solving with a simple, powerful 3-step approach that works across all languages and challenges. White House draws out mass federal firings timeline as GOP grows squeamish in funding ...

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Wanna see a trick? Give us any topic and we can tie it back to the economy. At Planet Money, we explore the forces that shape our lives and bring you along for the ride. Don't just understand the ...

Abstract: Reasonable allocation and utilization of resources in modern industrial production is the key to improve production efficiency and reduce costs. As an effective mathematical optimization ...

Abstract: Petri net is a graphical and mathematical modeling tool for concurrent systems. Business work flow is one of successful application area of Petri net. Workflow net is a subclass of Petri net ...