- #1
kakarotyjn
- 98
- 0
A method to get the Laurent series of a complex function is by undetermined coefficient.For example f(z)=cot(z)=cos(z)/sin(z).If we want to get the Laurent series of cot(z),we can expand cos(z) and sin(z) to Taylor series respect,then assume the series of cot(z) is [tex]a_{ - 1} z^{ - 1} + a_0 z^0 + a_1 z^1 + ...[/tex],
we can get a_-1,a_0... one by one.
But how to calculate its convergence radius?
Thank you!
we can get a_-1,a_0... one by one.
But how to calculate its convergence radius?
Thank you!