To extract a contradiction argument you would have to assume that x + y ≠ 88 and show this leads to a contradiction. Since many other values (other than 88) are possible, I think you'd have a tough time with this.

Bob

It might be doable -- I haven't tried via contradiction, although I'd assume you'd start with *x + y < 88* and find bounds for *a + b + ab* that don't include 2020, then do something similar for the case *x + y > 88*. The AM-GM inequality might help for this due to the ab term. However, the problem seems engineered to make use of the factorisation *(a + 1)(b + 1) - 1* = *a + b + ab*.

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Topologists too?

Mostly the people that are employed here in these installations that I saw were applied not pure.

]]>Shivam is right.

]]>A better question is why mathematicians are paid?

Because what mathematicians do is important.

]]>I know what noemi would say.

]]>]]>I've heard that too much money can make you different.