a. span(v1, v2, ..., vn) = V means that any vector v in V can be expressed
b. The vectors v1, v2, ..., vn are linearly independent when
c1v1 + c2v2 + ... + cnvn = 0 has
solution, namely
(c1, c2, ..., cn) =
c. To say that B = {v1, v2, ..., vn} forms a basis for V means that
d. If B = {v1, v2, ..., vn} is a basis for V then any vector v in V can be expressed
as a linear combination of the vectors in B.
e. If B = {v1, v2, ..., vn} is a basis for V, and v in V, then [v]B = (c1, c2, ..., cn)
means that
f. To say that B = {u1, u2, ..., un} is an orthogonal basis of V means that
g. To say that B = {w1, w2, ..., wn} is an orthonormal basis of V means that
h. Orthogonal (and orthonormal) bases are useful because
C1V1 + C2V2 + ... + CnVn = 0 has C1, C2, ..., Cn) =
solution, namely