Re: obtaining notes on classic textbooks

matthias@xxxxxxxxxxx wrote:
Dani wrote:
For me, the solutions are used to check my own solutions.

Suppose that you write a proof for some problem, and then you open the
solutions manual and find a completely different proof. How does that
help you tell whether your proof is correct?

Just speaking from my own experience: Sometimes there will be enough
similarities at least to show me whether I've been working in the
right direction. Or, perhaps I'll spend some time working out *why*
the book solution's approach was different from mine, and if perhaps in
similar situations in the future I should use the book's approach instead.
At the very least it may show me an alternate approach that might help
with other proofs.

But perhaps the most valuable thing to me is that it can keep me from
getting permanently *stuck*. I'm the sort of person who has a very
hard time making myself move on to question 5 if I haven't finished
question 4 yet. I may spend hours -- or days -- trying to get past a
particular problem without success. At such times it's really nice to be
able to look at least a part of a solution and get some hints about how
to proceed. That doesn't help me learn much if I do it every time I'm
not sure about something, but after spending a *lot* of time wrestling
with something it's nice to be able to look up a correct solution,
figure out where I went wrong, and move on to something else. At least
it avoids the situation of getting part way through a book, only to get
irrevocably stuck, and end up putting the book away for a few days, or
weeks, before coming back to it -- or possibly never finishing it at all.

--
Wayne Brown (HPCC #1104) | "When your tail's in a crack, you improvise
fwbrown@xxxxxxxxxxxxx | if you're good enough. Otherwise you give
| your pelt to the trapper."
e^(i*pi) + 1 = 0 -- Euler | -- John Myers Myers, "Silverlock"
.