Exercise 1.6.31

Answers

1.

This is the conclusion of

W_{1} \cap W_{2} \subset W_{2}

2.

By the formula in 1.6.29(a) we have the left hand side

= m + n - \dim (W_{1} \cap W_{2}) \leq m + n

since dim $(W_{1} \cap W_{2}) \geq 0$ .

jephianlin

2011-06-27 00:00