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Differential Operators
Mathematica's approach to differential operators provides both an elegant and a convenient representation of mathematical structures, and an immediate framework for strong algorithmic computation. With breakthrough methods developed at Wolfram Research, Mathematica can perform direct symbolic manipulations on objects that represent solutions to differential equations.
Derivative representation of derivatives with respect to any function argument
y',y'', etc. short forms for Derivative
    
DSolve solve systems of differential equations
    
DifferentialRoot symbolic representation of solutions to linear differential equations
FunctionExpand expand differential roots in terms of special functions, etc.
DifferentialRootReduce canonicalize to differential root form
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