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To truncate a real number is to discard its noninteger part. Truncation of a (positive) number x therefore corresponds to taking the floor function |_x_|. Truncation also ...

A conjecture which treats the heights of points relative to a canonical class of a curve defined over the integers.

A linkage used in the original steam engine to turn back-and-forth motion into approximately straight-line motion.

If two curves of the same curve genus >1 are in rational correspondence, then that correspondence is birational.

An natural equation which expresses a curve in terms of its arc length s and tangential angle phi.

Suppose W is the set of all complex-valued functions f on the interval [0,2pi] of the form f(t)=sum_(k=-infty)^inftyalpha_ke^(ikt) (1) for t in [0,2pi], where the alpha_k in ...

On an algebraic curve, the sum of the number of coincidences at a noncuspidal point C is the sum of the orders of the infinitesimal distances from a nearby point P to the ...

If there is a (nu,nu^') correspondence between two curves of curve genus p and p^' and the number of branch points properly counted are beta and beta^', then ...

A pair of zips, each zip being half a zipper, which can be zippered up to close a surface along a curve. The concept of a zip-pair can be extremely useful in topological ...

Differential Geometry