P1 If we have a curve c, from a point p0 to a point p1 then the line integral for work depends only on the end points and not on the actual path we chose.
OK, so the claim is if I have a line integral to compute, that it doesn't matter which path I take b as long as it goes from point a to point b.
也就是，如果我需要计算一个线积分，无论我取怎样的路径,只要路径是从点a到点。
3
But the critical point is that commitments to maintain levels of aid are not an additional extra to the recovery agenda, but an integral element for its success.