solve

mavropnevma

Very weak, since the discriminant of the equation in $x$ is $\Delta = 338 - (2y+13)^2$ .

Solutions $(3,2)$ , $(10,2)$ and $(0,0)$ , $(13,0)$ .

**Posted:** Wed Nov 04, 2009 7:41 am

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Arrange your tan · Riemann Hypothesis Offline Joined: 08 Nov 2007 Posts: 387

**Posted:** Wed Nov 04, 2009 8:13 pm

mavropnevma

It is a matter of notation. For most mathematicians $\mathbb{Z}_+$ includes zero; if we want to exclude it, either use $\mathbb{Z}_+^*$ or use plain English and say "positive integers".

**Posted:** Wed Nov 04, 2009 10:41 pm

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aadil

**Posted:** Thu Nov 05, 2009 5:02 am

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Rotfl

quantum mechanics-the gem of physics

JBL

Discussions about ambiguous notations are ridiculous: if you want people to know what you mean, use an unambiguous notation like $\mathbb{Z}_{> 0}$ or $\mathbb{Z}_{\geq 0}$ or just define what you mean in words. Of course, in this case it doesn't matter since if you personally don't think that 0 is in whatever the set in question is, you can simply throw out those solutions that include it.

**Posted:** Thu Nov 05, 2009 6:11 am

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Joel
Hi Deeps! <3