Fillet,Filet
发表于 2025-3-28 18:11:45
Letter to the editor,В моей работе «О представлении непрерывных функций трех переменных суперпозициями непрерывных функций двух переменных», опубликованной в «Математическом сборнике» (т. 48 (90) (1959), 3-74), ммеется ошибка, на которую мое внимание любезно обратил Боте (Н. О. Bothe).
Interregnum
发表于 2025-3-28 19:15:39
Vladimir I. Arnold,Alexander B. Givental,Boris A. Collected Works of one of the most outstanding mathematicians of all times.
哺乳动物
发表于 2025-3-29 00:41:27
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公司
发表于 2025-3-29 04:28:30
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Radiculopathy
发表于 2025-3-29 10:55:47
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nettle
发表于 2025-3-29 13:12:26
The stability of the equilibrium position of a Hamiltonian system of ordinary differential equation . if the equilibrium position is stable in the first (linear) approximation. Then, as was shown by Birkhoff , by a proper choice of the variables ., ., . the Hamiltonian assumes the form .where . is an analytic function of ., ., ., . ≥ 2 and arbitrary. We call a case a . case if among the constants .. (2 ≤ . < ∞) is different from zero.
eardrum
发表于 2025-3-29 18:47:22
Some remarks on flows of line elements and frames,the spaces of line elements and frames of a Riemannian manifold - the isotropic flows. These include flows connected with curves of constant geodesic curvature and with the motion of a charged particle on a smooth surface in the presence of a magnetic field.
导师
发表于 2025-3-29 21:52:44
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compose
发表于 2025-3-30 03:47:59
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北京人起源
发表于 2025-3-30 05:18:35
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