## Oscillatory properties of second order half-linear difference equations.(English)Zbl 0982.39004

Summary: We study oscillatory properties of the second order half-linear difference equation $\Delta(r_k|\Delta y_k|^{\alpha -2}\Delta y_k)-p_k|y_{k+1}|^{\text{ad}}y_{k+1}=0, \quad \alpha >1. \tag{HL}$ It is shown that the basic facts of oscillation theory for this equation are essentially the same as those for the linear equation $\Delta(r_k\Delta y_k)-p_ky_{k+1}=0.$ We present here the Picone type identity, Reid Roundabout Theorem and Sturmian theory for equation (HL). Some oscillation criteria are also given.

### MSC:

 39A11 Stability of difference equations (MSC2000)
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### References:

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