Chinese 辛流形 Cited by user 書畫晝盡 on 25 Dec 2023 微分几何中,辛流形是装备了闭非退化2-形式ω的光滑流形M,ω称为辛形式. 辛流形的研究称为辛几何或辛拓扑. 辛流形作为经典力学和分析力学中流形的余切丛自然出现,例如在经典力学的哈密顿表述中(这该领域的主要动机之一),系统所有可能构型的空间可以用流形建模,流形的余切丛描述了该系统的相空间.
Swedish Vågfront Cited by user Hans Frörum on 25 Apr 2023 Vågfront är en samling av sammanhängande punkter (linje eller yta) där en våg har samma fas.
English Symplectic manifold Cited by user Lantonov on 12 Nov 2020 In differential geometry, a subject of mathematics, a symplectic manifold is a smooth manifold,
English Wavefront Cited by user Lantonov on 12 Nov 2020 In physics the wavefront of a time-varying field is the set (locus) of all points where the wave has the same phase of the sinusoid.