detumescence
发表于 2025-3-21 19:52:39
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解开
发表于 2025-3-21 23:27:46
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chiropractor
发表于 2025-3-22 02:04:45
Potential Differential Systems of Order One and Catastrophe Theory,calar field ƒ, and curves of maximal local increase off. If the potential ƒ is a subharmonic (respectively harmonic or supraharmonic) fuction, i.e., Δf≥ 0 (respectively Δf = 0 or Δƒ≤ 0), then the flow generated by grad f increases (respectively preserves or decreases) the volume (see 5.1).
admission
发表于 2025-3-22 05:46:30
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项目
发表于 2025-3-22 10:25:01
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Figate
发表于 2025-3-22 15:11:21
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Figate
发表于 2025-3-22 18:58:35
Book 2000e trajectory followed by a particle at a point of the definition domain of a vector field, if the particle is sensitive to the related type of field. Therefore, field lines appear in a natural way in problems of theoretical mechanics, fluid mechanics, physics, thermodynamics, biology, chemistry, etc
倔强不能
发表于 2025-3-22 22:35:29
e shows the trajectory followed by a particle at a point of the definition domain of a vector field, if the particle is sensitive to the related type of field. Therefore, field lines appear in a natural way in problems of theoretical mechanics, fluid mechanics, physics, thermodynamics, biology, chemistry, etc978-94-010-5822-3978-94-011-4187-1
预测
发表于 2025-3-23 02:38:55
https://doi.org/10.1007/978-1-349-19886-3are self-distributed as tangent vectors to curves. The parallel, torse forming, Newtonian, electrostatic, etc vector fields serve as examples for finding analytic expressions of the field lines (see 3.1, 3.2).
detach
发表于 2025-3-23 07:10:56
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