The naturality of the canonical projections?
94287
Is natural projection a natural transformation?
34272
Proving definition of norms induced by vector norms
146099
Why is this true: The only orthogonal projection that is also unitary from $\Bbb C^n$ to $\Bbb C^n$ is the identity
65888
A counterexample to theorem about orthogonal projection
15197
Relation between trace and rank for projection matrices
29862
Projective resolution of a filtered colimit
103628
Is the canonical parameter (and therefore the canonical link function) for a Gamma not unique?
157968
The projection of an ellipse is still an ellipse
97040
Question about an application of the Rank-Nullity theorem
88013
injective linear transformation basis.
30356
$a =\prod_{i = 1}^{r} p_{i}^{ai}$ with $a_{i} > 0$ for each $i$ is the canonical representation of $a$...
153028
Showing that the product of vector magnitudes is larger than their dot product
156922
Proving convergence iff projection converges in product topology
136698
Why are there different ways of building projection matrices?
102856
Intersection of kernels and linear dependence of functionals
35625
Direct sum of orthogonal subspaces
73821
Understanding the coordinate system for ImageTake