Doppler effect: an understandable explanation for a mathematician
I have curiosity by
> **Question.** Can someone explain me, and to the audience too, the mathematical essence behind the so called _Doppler effect_? Thanks in advance.
Then you have the ability to translate for example from [1], or another reference in physics, the essentials in mathematical language. I excuse this questions because is a nice topics including functions, derivatives, frecuencies, and I believe too functional equations.
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**References:**
[1] Wikipedia, Doppler effect <