429 karma · joined November 22, 2021
> Unknotting number has long been conjectured to be additive under connected sum; this conjecture is implicit in the work of Wendt, in one of the first systematic studies of unknotting number [37]. It is unclear when and where this was first explicitly stated; most references to it call it an ‘old conjecture’. It can be found in the problem list of Gordon [13] from 1977 and in Kirby’s list [16].
'Additive' here means that if u(K1) is defined as the unknotting number of the knot K1, and u(K1#K2) the unknotting number of the knots K1 and K2 joined together, then u(K1#K2) = u(K1) + u(K2). It is this that has (assuming the paper is correct) been proven false. A deceptively simple property!
edit: I initially incorrectly had a ≤ sign instead of =
That said, the article doesn't assume such a thing will happen soon, just that it may happen at some time in the future. That could be centuries away - I would still argue the end result is something to be concerned about.
I don't literally live in a cave, but fortunately not everyone is so allergic to whimsical language :D.
That said, there are times when a certain type of appreciation of 'sophistication' is warranted - you just shouldn't use it to believe you are therefore above other people, or beyond the simple pleasures of life.
Personally I hope that the current wave of AI is over hyped and misunderstood (so that e.g. https://ai-2027.com/ will be a comical footnote one day) and that symbolic reasoning will make a comeback in a new form.