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Find $k$, as a function of $d_2$ and $d_3$, such that:

$$\left \vert { d_2 \left [ \sin(e^{d_3\,y}) - \sin(e^{d_3\,x})\right] + (x-y) d_2 d_3 e^{d_3\,z} \cos(e^{d_3\,z})} \right \vert \le k (\vert{x-z}\vert + \vert{y-z}\vert) \,\vert{x-y}\vert$$

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    hell of the inequality :D2012-11-23
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    hell of what? i voted it as an useful comment because this comment makes me laugh. i do not know why2012-11-23
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    I see that k appears only on RHS. Why don't you divide the inequality by the number multiplied by k2012-11-23

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