why is it that if the harder problem is unsolvable, it implies that the easier problem is unsolvable? because earlier you said that the harder problem was portland to cairo, which contains portland to new york to cairo. so if the plane from portland to new york is crashed, doesn't mean that the easier problem new york to cairo doesn't work.
Thank you! This is the clearest explanation I've found on youtube. Is there anywhere you upload PDFs of your notes? I'd love to have them to study with.
I think u may have made a mistake in reductions. because we generally reduce a harder problem to its equivalent harder problem or more harder than that. If we get a solution to the harder problem ,we can use that solution to get the solution for the easier problem.
