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Sturmian theorems for a class of elliptic equations of order 4m. (English) Zbl 0304.35004

35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
35J25 Boundary value problems for second-order elliptic equations
35J40 Boundary value problems for higher-order elliptic equations
Full Text: DOI
[1] lace E. L., Ordinary Differential Equations (1956)
[2] Picone M., Ann, Scuola Norm, Sup 39 (1909)
[3] DOI: 10.2307/2312941 · Zbl 0106.06003
[4] Zanichelli, N. 1948. Bologna. 1948.
[5] Diaz J. B., Atti Reale Ace. Naz. Lincei, Mem. Ci. ScL Ms. Mat. Nat., Ser 9 pp 133– (1969)
[6] Diaz J.B., Applicable Analysis 9 (1969)
[7] Nicolesco M., Les fonctions polyharmoniques (1936) · JFM 62.1302.01
[8] Dunninger D. R., Maximum principles for solutions of some fourth order elliptic equations (1936) · Zbl 0227.35039
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