Existence of Triply periodic function.
95224
Why does triply periodic univariate function not exist?
78472
Sequence is periodic $x_{n+2}=|x_{n+1}-x_{n-1}|$
108118
Poincaré-Bendixon show periodic solutions.
4084
Does there exist a holomorphic function with the following property?
9748
Maximum modulus principle for an unbounded function in the half right plane
20568
Does the following have a solution for f(x,y)?
62268
Doubly periodic entire function with periods that are linearly independent over $\mathbb{Q}$ is constant.
149895
A more convenient Fourier series
86618
Approximating Riemann integrable functions
84317
Iterated self-composition of arbitrary function
33628
Prove that $\sin(\sqrt x)$ not periodic
36212
Harmonic Function with linear growth
152590
At most finitely many (Hamel) coordinate functionals are continuous - different proof
7878
Proving that a doubly-periodic entire function $f$ is constant.
62817
Functions which are Continuous, but not Bicontinuous
623
variation of a function over countable intervals
144331
Periodic function implies periodic primitive?