Good day!

Does anybody know how to define double Greek letters in the text? There is an implementation using \usepackage{mathbbol}, but this gives an "ugly" variant of writing. :-) I wish that the result would be closer to the following.

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Or is it the same as mtpro2. For myself I use the ConcreteMath font style. Naturally, it also requires a double characterization of the \Gamma \Delta and \Lambda.


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