Define a subspace of a vector space V . Take the set of vectors
in Rn such that th
coordinates add up to 0. I that a subspace. What about the set
whose coordinates add
up to 1. Explain your answers.
A subspace of Rn
is any set H in Rn
that has three properties:
a) The zero vector is in H.
b) For each
u and
v in H, the sum
u +
v is in H.
c) For each
u in H and each scalar c, the vector cu
is in H.
Explain which property is not valid in one of the following regions
(use a specific counterexample in your response):
a) Octant I
b) Octant I and IV...
Suppose that ? and ? are subspaces of a vector space ? with ? =
? ⊕ ?. Suppose also that ??, … , ?? is a basis of ? amd ??, … , ??
is a basis of ?. Prove ??, … , ??, ??, … , ?? is a basis of V.
Which of the following properties are vectors and which are
scalars considering a three-dimensional space? Give a “typical”
symbol and the S.I. units used to describe these properties, i.e.
if I asked for mass density you would answer: ρ is a scalar in
units g cm3 = 103 kg m3 ; maybe even state ρ = m V . a) force b)
mass c) angular displacement d) energy e) linear acceleration f)
the period of a pendulum g) work h)...
Verify using an example that vector a + (vector b * vector c) is
not equal to (vector a + vector b) * (vector a + vector c) explain
the problem that arrises
5. With each stated property, give an example of the 2-space
vector field F(x,y). (a) F has a constant direction, but ||F||
increases when moving away from the origin. (b) F is perpendicular
to the vector field and ||F||=5 everywhere.