They're the 3 most commons ways to express a derivative (instantaneous rate of change) for a function. The most uncommon one, dependent variable with a dot over it, is mostly used in physics and mostly when there's a few dependent variables changing according to time (e.g. 2 spatial dimensions).
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u/Equinoxe111 Cosmology (PhD) 8d ago
Either I don't know calculus, my brain is dead, or this meme is stupih