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Studio di certe varieta collegate con un particolare problems non lineare. (Italian) Zbl 0142.34803

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References:

[1] Fite W.B. : Periodic solutions of linear differential equations . Ann. of Math. , ( 2 ), 28 ( 1927 ). JFM 52.0461.02 · JFM 52.0461.02
[2] Floquet G. : Sur les équations différentielles linéaires à coefficients périodiques . Ann. Sc. de l’Éc. Norm. Sup. , ( 2 ), XII ( 1883 ). Numdam | JFM 15.0279.01 · JFM 15.0279.01
[3] Hill G.W. : On the part of the motion of the lunar perigee which is a function of the mean motions of the sun and moon . Acta Math. , VIII ( 1886 ). JFM 18.1106.01 · JFM 18.1106.01
[4] Liapounoff A. : Sur une série relative à la théorie des équations différentielles linéaires à coefficients périodiques . C. Rend. Ac. Sc. 123 ( 1896 ). JFM 27.0252.03 · JFM 27.0252.03
[5] Liapounoff A. : Sur une équation différentielle linéaire du second ordre . Op. cit. , 128 ( 1899 ). JFM 30.0302.02 · JFM 30.0302.02
[6] Liapounoff A. : Sur une équation trascendante et les équations différentielles linéaires du second ordre à coefficients périodiques . Op. cit. , 128 ( 1899 ). JFM 30.0303.01 · JFM 30.0303.01
[7] Miranda C. : Problemi di esistenza in analisi funzionale ( Pisa , 1948-49 ). MR 394320 | Zbl 0041.43401 · Zbl 0041.43401
[8] Sansone G. : Equazioni differenziali nel campo reale , I ( Bologna , 1956 ). JFM 67.0306.01 · JFM 67.0306.01
[9] Underwood F. : Note on the periodic solutions of linear differential equations . Ann. of Math. , ( 2 ), 31 ( 1930 ). MR 1502968 | JFM 56.0384.02 · JFM 56.0384.02
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