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Partial differential equations (PDEs) are equations that relate the partial derivatives of a function of more than one variable. This tag is intended for questions on modeling phenomena with PDEs, solving PDEs, and other related aspects.
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Why is the time dimension special?
Generally speaking, I've heard numerical analysts utter the opinion that
"Of course, mathematically speaking, time is just another dimension, but still, time is special"
How to justify this? I …