All vectors are in R^ n. Prove the following statements.
a) v·v=||v||2
b) If ||u||2 + ||v||2 = ||u + v||2, then u and v are
orthogonal.
c) (Schwarz inequality) |v · w| ≤ ||v||||w||.
Suppose u, and v are vectors in R m, such that ∥u∥ = 1, ∥v∥ = 4,
∥u + v∥ = 5. Find the inner product 〈u, v〉.
Suppose {a1, · · · ak} are orthonormal vectors in R m. Show that
{a1, · · · ak} is a linearly independent set.
Question 1
a) Prove that if u and v are distinct vertices of a graph G,
there exists a walk from u to v if and only if there exists a path
(a walk with distinct vertices) from u to v.
b) Prove that a graph is bipartite if and only if it contains no
cycles of odd length.
Please write legibly with step by step details. Many thanks!
Let U, V be iid Unif(0, 1) random variables, and set
M = max(U,V) and N = min (U,V)
(a) Find the conditional density of N given M = a for any value
of a ∈ (0, 1).
(b) Find Cov(M, N).
1. Let U = {r, s, t,
u, v, w, x, y,
z}, D = {s, t, u,
v, w}, E = {v, w,
x}, and F = {t, u}. Use roster
notation to list the elements of D ∩ E.
a.
{v, w}
b.
{r, s, t, u, v,
w, x, y, z}
c.
{s, t, u}
d.
{s, t, u, v, w,
x, y, z}
2. Let U = {r, s,
t, u, v, w, x,
y, z},...
Exercise 2.5.1 Suppose T : R n ? R n is a linear transformation.
Prove that T is an isometry if and only if T(v) · T(w) = v · w.
Recall that an isometry is a bijection that preserves distance.