## Generalization of amplitude phase and accompanying differential equation.(English)Zbl 0261.34006

### MSC:

 34A30 Linear ordinary differential equations and systems
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### References:

 [1] Borůvka O.: Lineare Differentialtransformationen 2. Ordnung. Berlin 1967. · Zbl 0153.11201 [2] Háčik M.: O splynutí diferenciálnej rovnice $$y'' = q(t)y$$ s jej sprievodnou rovnicou. Sborník prací VŠD a VÚD Žilina [3] Laitoch M.: Ľéquation associée dans la théorie des transformations des équations différentielles du second ordre. Acta Univ. Palackianae Olomucensis 1963 TOM 12 pp. 45-62. · Zbl 0256.34005
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