The system of partial differential equations
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(1)
 
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(2)
 
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The system of partial differential equations
| 
 
(1)
 
 | |||
| 
 
(2)
 
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Weisstein, Eric W. "Drinfeld-Sokolov-Wilson Equation." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Drinfeld-Sokolov-WilsonEquation.html