characteristic
发表于 2025-3-23 11:07:18
The problem of realizing the Lobachevsky geometry in Euclidean space,ive curvature.We describe the apparatus of fundamental systems of equations of the theory of surfaces in . and discuss specifics of its application to the analysis of surfaces of constant negative Gaussian curvature.
fodlder
发表于 2025-3-23 15:24:30
The sine-Gordon equation: its geometry and applications of current interest, diverse approaches to the investigation of problems connected with the sine-Gordon equation is the intimate association of this equation with surfaces of constant negative curvature, i.e., with pseudospherical surfaces.
OFF
发表于 2025-3-23 19:20:10
Lobachevsky geometry and nonlinear equations of mathematical physics,etation. The development of this geometric approach to nonlinear equations of contemporary mathematical physics enables us to apply in their study the rather well developed apparatus and methods of non-Euclidean hyperbolic geometry.
Occipital-Lobe
发表于 2025-3-24 01:18:17
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愚蠢人
发表于 2025-3-24 05:54:45
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虚情假意
发表于 2025-3-24 07:46:08
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威胁你
发表于 2025-3-24 11:54:38
Andrey Popovu ihm sagte: „Höre, wir sind in einem bedeutenden Moment. Entweder wir haben in diesem Augenblick ein Erdbeben, oder wir bekommen eins... Am nächsten Tage“, so berichtete er weiter, „erzählte mein Herr seine Beobachtungen bei Hofe, wobei eine Dame ihrer Nachbarin ins Ohr flüsterte: ‚Höre! Goethe sch
PALL
发表于 2025-3-24 16:16:16
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逢迎春日
发表于 2025-3-24 21:10:56
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Dendritic-Cells
发表于 2025-3-25 02:07:16
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