Mineral cleavage is a property of cohesion. The cleavage of the particles themselves and its attitude with reference to the plane of the greatest and mean dimensional axes help to determine the perfection of rock cleavage. The more nearly parallel to the greater dimensions of the particle, and the better the mineral cleavage, the better the rock cleavage produced.

In symplectic geometry, there is a notion of fibrations 𝜋:P→M with a symplectic manifold F as fiber, where the structure group is the group of (exact) Hamiltonian symplectomorphisms of the fiber. These are called symplectic fibrations. If the base manifold (M,𝜔_M) is also symplectic, there is a weak coupling construction, originally due to Thurston, of defining a symplectic structure on the total space P.

a wall with a counterslope

There is often little, if any, competition, – you may find you are the only buyer who knows about the silent listing and this exclusivity can mean buying for a lower price than on the open market.