Help showing that u is harmonic.
94489
Mean value property implies harmonicity
98913
Sign in $\Delta U= -\int\vec{F}\cdot d\vec{l}$
27482
How to show $-\sup(-A)=\inf(A)$?
58321
Convergence of "alternating" harmonic series where sign is +, --, +++, ----, etc.
126089
Showing $U(20)$ is not cyclic: Is my proof correct?
36212
Harmonic Function with linear growth
97522
Calculating a limit with Harmonic number
65463
Explanation: Simple Harmonic Motion
99365
UMVUE for $\theta^2$
49073
how to obtain solution for $u_t+u=u_{xx}$
59624
Showing inequality for harmonic series.
8192
Simple proof of showing the Harmonic number $H_n = \Theta (\log n)$
34702
Show $|A + uv^T| = (1 + v^T A^{-1} u) |A|$
57677
Decomposition of Harmonic function into sum of holomorphic and anti-holomorphic function
97192
product of harmonic functions
68262
How to prove that a motion is Simple Harmonic Motion (SHM)?
121547
Differential equation for Harmonic Motion