Can a symmetry of a subset of the plane always be extended to the entire plane?
139308
Every partially defined isometry can be extended to a isometry
60008
Can we always view loops as maps from $S^1\to X$?
71990
Prove there always exists a partition such that vertices in each part have even degree
13549
Can an $(a,b)$-knight reach every point on a chessboard?
45098
How do we prove the "lying over" property for integral extensions?
130872
Map $f: S^n \to S^n$ that extends over $D^{n+1}$ must identify a pair of antipodal points
111024
Does $gHg^{-1}\subseteq H$ imply $gHg^{-1}= H$?
86105
Can $\{(f(t),g(t)) \mid t\in [a,b]\}$ cover the entire square $[0,1] \times [0,1]$ ?
70303
Parametric form of a plane
60436
How are symmetries precisely defined?
28272
Does such localization of integral extension preserve inclusion?
143269
Existence of area-preserving diffeomorphism between two sets in $\mathbb{R}^2$
108366
How to create an infinite plane in cycles?
13755
Is there a harmonic function in the whole plane that is postive everywhere?
137563
Can a left coset be strictly contained in a right coset?
3420
Uniqueness of Extended Euclidean Algorithm
88736
How does the Axiom of Extensionality prove the uniqueness of Specified sets?