Library
| Author | Title |
|---|---|
| Umlauf K. | Abhandlungen uber den Mathematischen Unterricht in Deutschland, Bd 1-5 |
| Urabe M. | Nonlinear autonomous oscillations. Analytical theory. |
| Urlacher E. | Equationsd Differentialles Du Type ex"+f(x')+x=0 |
| Urlacher E. | Oscillation de Relaxation et Analyse Non Standart |
| Ursell H.D. and Young L.G. | Remarks on the theory of prime ends |
| Uspensky J.V. | Theory of equations |