RE: Demostration

*To*: mathgroup at smc.vnet.net*Subject*: [mg70394] RE: [mg70369] Demostration*From*: "Erickson Paul-CPTP18" <Paul.Erickson at Motorola.com>*Date*: Sun, 15 Oct 2006 00:19:16 -0400 (EDT)

I guess this doesn't 'prove', but perhaps demonstrates: Select[ Range[-100000,200000], IntegerQ[Sqrt[#^3+9]] &] {-2,0,3,6,40} There are 5 x values within a reasonable range. The ten (fine pairs) are +/- due to the Sqrt for y. You might choice a smaller range in order for faster execution ;-) -----Original Message----- From: Miguel [mailto:mibelair at hotmail.com] To: mathgroup at smc.vnet.net Subject: [mg70394] [mg70369] Demostration How canI to demostrate than the equation y^2=x^3+9 has 10 integer solutions?