Franz Rellich has written:

'Spectral theory of a second-order ordinary differential operator' -- subject(s): Differential equations, Differential operators

Faith Yao-yu Chao has written:

'Existence and completeness of wave operators for differential operator perturbations' -- subject- s -: Differential equations, Differential equations, Partial, Hilbert space, Partial Differential equations, Spectral theory - Mathematics -, Wave equation

In a large truck they are a lever that operates gears in your differential, doubling the number of different gear ratios available to the operator. The driver must shift two levers to change gears. There will be 1 low, 1 high, 2 low, 2 high and so on.

Donald Harry Cone has written:

'Difference expressions for the three-dimensional Laplacian operator' -- subject(s): Differential equations, Laplace transformation

The different types of operators are as follows: *Arithmatic operator *Relational operator *Logical operator *Assignment operator *Increment/Decrement operator *Conditional operator *Bitwise operator *Special operator