天文台
发表于 2025-3-23 10:56:54
http://reply.papertrans.cn/23/2271/227087/227087_11.png
者变
发表于 2025-3-23 15:34:43
http://reply.papertrans.cn/23/2271/227087/227087_12.png
choroid
发表于 2025-3-23 22:00:07
Analysis on ManifoldsThe intuitive picture of a smooth surface becomes analytic with the concept of a manifold. On the small scale a manifold looks like a Euclidean space, so that infinitesimal operations like differentiation may be defined on it.
紧张过度
发表于 2025-3-24 01:13:34
http://reply.papertrans.cn/23/2271/227087/227087_14.png
贪婪的人
发表于 2025-3-24 04:07:45
http://reply.papertrans.cn/23/2271/227087/227087_15.png
parallelism
发表于 2025-3-24 07:36:11
http://reply.papertrans.cn/23/2271/227087/227087_16.png
贪婪性
发表于 2025-3-24 12:34:40
http://reply.papertrans.cn/23/2271/227087/227087_17.png
CHAFE
发表于 2025-3-24 15:00:46
Introduction to Classical Field TheoryElectric and magnetic fields are dynamically interconnected in such a way that an electromagnetic disturbance propagates with a universal velocity in empty space. By studying this phenomenon we gain a qualitative understanding of field radiation and are led to expect analogous gravitational behavior.
项目
发表于 2025-3-24 22:19:36
The Electromagnetic Field of a Known Charge DistributionIf the field equations originate from a stationary-action principle, then a conserved current can be constructed for each parameter of an invariance group.
沟通
发表于 2025-3-25 02:06:17
The Field in the Presence of ConductorsThe superconductor is a simple model of a coupled system of equations for changed matter and an electromagnetic field. As a perfect conductor and diamagnet it excludes all electric and magnetic fields from its interior.