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it's the final countdownnnnn nanananaaa nananananaaa


Apr
23
asked Determining an Analytic Function from its Real Part
Apr
22
comment Show bounded harmonic function on $\mathbb{C}$ is constant.
but how do we know that f is bounded? Only its real part is necessarily bounded.
Apr
22
revised Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
added 1 characters in body
Apr
22
comment Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
I agree, the integral always equaling the conjugate of f at a single point is for me a very counterintuitive.
Apr
22
revised Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
added 65 characters in body
Apr
22
answered Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
Apr
22
comment Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
You're right, my professor may have forgotten to stipulate that z be in the unit circle, since if it is I think I came up with a proof by expanding f as a power series centered at zero.
Apr
22
asked Help me prove the identity $\overline{f(0)} = \frac{1}{2\pi}\int_0^{2\pi}\frac{e^{i\phi}}{e^{i \phi}-z}\overline{f(e^{i\phi})}d\phi$
Apr
21
comment Can someone check my work on this integral?
log|z| has a singularity at zero, thus it's not holomorphic in a neighborhood containing our curve.
Apr
21
accepted Can someone check my work on this integral?
Apr
21
comment Can someone check my work on this integral?
Ok cool, thanks anon.
Apr
21
asked Can someone check my work on this integral?
Apr
21
accepted A few Questions about Harmonic Functions
Apr
21
comment A few Questions about Harmonic Functions
Ok thanks Thomas, I'll take a look at this.
Apr
21
asked A few Questions about Harmonic Functions
Apr
21
accepted The Integral of a Harmonic Function
Apr
21
comment The Integral of a Harmonic Function
Great, thanks for the detailed response Zarrax! +1.
Apr
21
comment The Integral of a Harmonic Function
Can you expand on this? Are you saying that the problem as stated is incorrect, and that I should switch the inequalities? Because that would make a lot more sense.
Apr
21
asked The Integral of a Harmonic Function
Apr
20
comment Show bounded harmonic function on $\mathbb{C}$ is constant.
Are harmonic functions automatically analytic in $\mathbb{C}$? I was under the impression that they only necessarily have continuous partial derivatives satisfying the Laplacian.