Write up a full proof of the fact that every k-dimensional
subspace of R^n is the...
Write up a full proof of the fact that every k-dimensional
subspace of R^n is the intersection of (n-k) hyperplanes. Tip: If
you don't know how to start, begin by summarizing your answers to
the previous problems on this lab.
(3) (a) Show that every two-dimensional subspace of R3 is the
kernel of some linear transformation T : R3 → R. [Hint: there are
many possible ways to approach this problem. One is to use the
following fact, typically introduced in multivariable calculus: for
every plane P in R3, there are real numbers a, b, c, d such that a
point (x,y,z) belongs to P if and only if it satisfies the equation
ax+by+cz = d. You may use this...
4. Here is a fact about permutations: (**) nPk = n!/(n-k)!, for
all k € ≤ n. Let’s prove this via mathematical induction for the
fixed case k=3.
(i) Write clearly the statement (**) we wish to prove. Be sure
your statement includes the phrase “for all n” .
(ii) State explicitly the assumption in (**) we will thus
automatically make about k=2.
(iii) Now recall that to prove by induction means to show that
If mPk = m!/(m-k)! is...
The n- dimensional space is colored with n colors such that
every point in the space is assigned a color. Show that there exist
two points of the same color exactly a mile away from each
other.
How to proof:
Matrix A have a size of m×n, and the rank is r. How can we
rigorous proof that the dimension of column space are always equal
to the dimensional of row space?
(I can use many examples to show this work, but how to proof
rigorously?)
Write up a formal proof that the angle bisectors of a triangle
are concurrent, and that the point of concurrency (the incenter) is
equidistant from all three sides.
In the proof of bolzano-weierstrass theorem in R^n on page 56 of
"Mathematical Analysis" by Apostol, should the inequality be
a/2^(m-2) < r/sqrt(n) or something related to n? a/2^(m-2) <
r/2 seems not enough