Local analytic classification of q-difference equations
Astérisque, no. 355 (2013) , 157 p.
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     author = {Ramis, Jean-Pierre and Sauloy, Jacques and Zhang, Changgui},
     title = {Local analytic classification of $q$-difference equations},
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     year = {2013},
     zbl = {1320.39008},
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     url = {http://archive.numdam.org/item/AST_2013__355__R1_0/}
}
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Ramis, Jean-Pierre; Sauloy, Jacques; Zhang, Changgui. Local analytic classification of $q$-difference equations. Astérisque, no. 355 (2013), 157 p. http://numdam.org/item/AST_2013__355__R1_0/

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