Group Abstract Group Abstract

Message Boards Message Boards

0
|
4.4K Views
|
2 Replies
|
0 Total Likes
View groups...
Share
Share this post:

Am I missing any parameter's to get a solution

Posted 5 years ago

I am trying to solve an equation that I know has solutions, but what I am trying isn't working as expected, am I missing something? Here is the equation

Reduce[{160755614715009600 + 152 y^2 + 2630 z^2 == 
   m (2567290440 + 152 y + 2630 z), y > 0, z > 0, m > 0}, {y, z, 
  m}, Integers]

Which gives me

(y | z | m) \[Element] Integers && y >= 1 && z >= 1 && 
 m == (80377807357504800 + 76 y^2 + 1315 z^2)/(
  1283645220 + 76 y + 1315 z)

Yet if I give the value for "m", I get a solution thus

Reduce[{160755614715009600 + 152 y^2 + 2630 z^2 == 
   33395648 (2567290440 + 152 y + 2630 z), y > 0, z > 0}, {y, 
  z}, Integers]

Resulting in

(y == 37928418 && z == 1194380) || (y == 37928418 && 
   z == 32201268) || (y == 46962630 && 
   z == 2087228) || (y == 46962630 && z == 31308420)

Or am I expecting too much?

POSTED BY: Paul Cleary
2 Replies
Posted 5 years ago
POSTED BY: Paul Cleary
Posted 5 years ago

Hi Paul,

Interesting that FindInstance gives this solution

eq = 160755614715009600 + 152 y^2 + 2630 z^2 - m (2567290440 + 152 y + 2630 z) == 0
FindInstance[{eq, y > 0, z > 0, m > 0}, {m, y, z}, Integers]
(* {{m -> 62616840, y -> 62616840, z -> 62616840}} *)

eq /. {m -> 62616840, y -> 62616840, z -> 62616840}
(* True *)
POSTED BY: Rohit Namjoshi
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard