regular at infinity
When the function of one complex variable is regular in the annulus
it has a Laurent expansion
(1) |
If especially the coefficients vanish, then we have
Using the inversion , we see that the function
is regular in the disc . Accordingly we can define that the function is regular at infinity also.
For example, is regular at the point and . Similarly, is regular at and has there the value 1.
Title | regular at infinity |
Canonical name | RegularAtInfinity |
Date of creation | 2013-03-22 17:37:30 |
Last modified on | 2013-03-22 17:37:30 |
Owner | pahio (2872) |
Last modified by | pahio (2872) |
Numerical id | 8 |
Author | pahio (2872) |
Entry type | Definition |
Classification | msc 30D20 |
Classification | msc 32A10 |
Synonym | analytic at infinity |
Related topic | RegularFunction |
Related topic | ClosedComplexPlane |
Related topic | VanishAtInfinity |
Related topic | ResidueAtInfinity |