Finding a general harmonic function
96303
When does $h(x^2+y^2)$ be harmonic?
31429
Finding the asymptotes of a general hyperbola
18207
Removable singularity for harmonic functions
37855
Sums and harmonic series
69207
Approximating the locations of the extrema of the sinc function
105264
Why are partial derivatives of a harmonic function also harmonic?
21922
Elegant way of obtaining the envelope of oscillating function
106531
A Fourier transform of a continuous $L^1$ function
34635
Two question on harmonic function
101101
'Cosine'-esque function with flat peaks and valleys
131780
How to directly evaluate path integral for harmonic oscillator by brute force method?
10357
Do harmonic numbers have a “closed-form” expression?
70448
Inequality for harmonic means
86618
Approximating Riemann integrable functions
110548
Can one find the beat of a tune with Fourier analysis?
36994
Finding the limit of a 2-dimensional function
65335
A "binomial" generalization of harmonic numbers