If an entire function maps a rectangle to another rectangle, then it is linear
114458
$f$ is entire and maps a rectangle to a rectangle, then $f$ is linear
60655
$\ker T\subset \ker S\Rightarrow S=rT$ when $S$ and $T$ are linear functionals
66895
A condition for the image of a metrizable space to be metrizable
82745
Showing Entire Function is Bounded
108329
If $T\alpha=c\alpha$, then there is a non-zero linear functional $f$ on $V$ such that $T^{t}f=cf$
152347
Proof that a certain entire function is a polynomial
124374
A bijective function between a square and its side
80279
Show that $S + T$ and $aT$ are linear
5373
Additive function $T: \mathbb{R} \rightarrow \mathbb{R}$ that is not linear.
48419
Difference between $\mathbb{R}$-linear and $\mathbb{C}$-linear maps
83046
A linear map, continuous at zero, is bounded
28289
Show that $Kf(x,y)=\int_0^1k(x,y) f(y) \,dy\\$ is linear and continuous
5644
Is a right inverse of a surjective linear map linear?
86105
Can $\{(f(t),g(t)) \mid t\in [a,b]\}$ cover the entire square $[0,1] \times [0,1]$ ?
61616
category of linear maps
140711
Linear independence of images by $A$ of vectors whose span trivially intersects $\ker(A)$
92337
Points in rectangular coordinate system - specifying coordinates as function values