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Home : Support : Online Help : System : Error Message Guide : expecting an ODE

Error, (in dsolve) expecting an ODE or a set or list of ODEs. Received ...

	Description
	Maple does not recognize the differential notation dy(x) representing the differential of the function y(x). To enter a differential equation in Maple, you must form the actual derivative. Work with the derivative $\frac{&DifferentialD; y}{&DifferentialD; x}$ , not dy and dx separated.

Examples

Example 1

>	$ODE ≔ dx y (x) - x dy (x) = 0 &semi;$

$ODE := dx y (x) - x dy (x) = 0$

(2.1)

>	$dsolve (ODE) &semi;$

Error, (in dsolve) expecting an ODE or a set or list of ODEs. Received dx*y(x)-x*dy(x) = 0

Solution 1

>	$ODE1 := y (x) - x (\frac{&DifferentialD;}{&DifferentialD; x} y (x)) = 0$

$ODE1 := y (x) - x (\frac{&DifferentialD;}{&DifferentialD; x} y (x)) = 0$

(2.2)

>	$dsolve (ODE1) &semi;$

$y (x) =_C1 x$

(2.3)

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