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1: 1.9 Calculus of a Complex Variable
Points of a region that are not boundary points are called interior points. …
Jordan Curve Theorem
2: 2.4 Contour Integrals
Now suppose that in (2.4.10) the minimum of ( z p ( t ) ) on 𝒫 occurs at an interior point t 0 . …
3: 19.2 Definitions
The integral for E ( ϕ , k ) is well defined if k 2 = sin 2 ϕ = 1 , and the Cauchy principal value (§1.4(v)) of Π ( ϕ , α 2 , k ) is taken if 1 α 2 sin 2 ϕ vanishes at an interior point of the integration path. …
4: 23.20 Mathematical Applications
The interior of R is mapped one-to-one onto the lower half-plane. … The interior of the rectangle with vertices 0 , ω 1 , 2 ω 3 , 2 ω 3 ω 1 is mapped two-to-one onto the lower half-plane. … Let T denote the set of points on C that are of finite order (that is, those points P for which there exists a positive integer n with n P = o ), and let I , K be the sets of points with integer and rational coordinates, respectively. …The resulting points are then tested for finite order as follows. …If any of these quantities is zero, then the point has finite order. …
5: 33.22 Particle Scattering and Atomic and Molecular Spectra
With e denoting here the elementary charge, the Coulomb potential between two point particles with charges Z 1 e , Z 2 e and masses m 1 , m 2 separated by a distance s is V ( s ) = Z 1 Z 2 e 2 / ( 4 π ε 0 s ) = Z 1 Z 2 α c / s , where Z j are atomic numbers, ε 0 is the electric constant, α is the fine structure constant, and is the reduced Planck’s constant. … For scattering problems, the interior solution is then matched to a linear combination of a pair of Coulomb functions, F ( η , ρ ) and G ( η , ρ ) , or f ( ϵ , ; r ) and h ( ϵ , ; r ) , to determine the scattering S -matrix and also the correct normalization of the interior wave solutions; see Bloch et al. (1951). …
§33.22(vi) Solutions Inside the Turning Point
6: 1.15 Summability Methods
at every point θ where both limits exist. … can be extended to the interior of the unit circle as an analytic function …
7: 3.4 Differentiation
Two-Point Formula
Three-Point Formula
Four-Point Formula
Five-Point Formula
Six-Point Formula
8: 2.1 Definitions and Elementary Properties
Let 𝐗 be a point set with a limit point c . As x c in 𝐗 If c is a finite limit point of 𝐗 , then … Similarly for finite limit point c in place of . … where c is a finite, or infinite, limit point of 𝐗 . …