Orientable is a somewhat unusual way of saying movable. It can be oriented in various directions.
A Klein bottle in mathematics is a non-orientable surface. The Klein bottle shows that from the left and the right, notions cannot always be defined and do not meet in the middle.
The fundamental group of a closed orientable surface of genus g is the quotient of the free group on the 2g generators a1,...,ag,b1,...,bg by the normal subgroup generated by the following product of g commutators: a1b1a1-1b1-1...agbgag-1bg-1.
surface decoration is the ornamenting the surface of a fabric or garment
Nan-Kuo Ho has written: 'Yang-Mills connections on orientable and nonorientable surfaces'
dk
The special surface created by taking a strip of paper, giving it a half twist, and joining the ends to form a loop is called a Mobius strip. It has the unique property of being non-orientable, which means it only has one side and one boundary.
A hard surface.
johnmark ibarra
What you can see of something
the surface tention of aliquid is the force per unit length on the surface that opposes the expansion of the surface area
That is the definition of the surface area!
The surface area is the sum of all the areas of all the shapes that cover the surface of the object.