an empty vine
Schomberg turned up, yawning affectedly, almost before Davidson had regained his seat.
Sche tok him thanne a maner glu, / The which was of so great vertu, / That where a man it wolde caste, / It scholde bind anon so faste / That noman mihte it don aweie.
In the language of differential geometry, the incompressible inviscid Euler equations can be written in vorticity-vector potential form as ∂ₜ𝜔+ℒᵤ𝜔=0\u=𝛿̃𝜂⁻¹𝛥⁻¹𝜔 where 𝜔 is the vorticity 2-form, ℒᵤ denotes the Lie derivative with respect to the velocity field u, 𝛥 is the Hodge Laplacian, 𝛿 is the codifferential (the negative of the divergence operator), and ̃𝜂⁻¹ is the canonical map from 2-forms to 2-vector fields induced by the Euclidean metric 𝜂.
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