|
We'll need a notation to
distinguish between the right and left:
|
Approaching
x =
2
from the left: |
 |
|
Approaching
x =
2
from the right: |
 |
So...
What about as Pierre runs
towards
x = -2
?
|
If he's coming in
from the right, he's climbing up.
If
he's climbing in from the left, he's climbing down. |
 |
Again, it matters whether he's
coming in from the right or the left:
Continued on the
next
page
|
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