[sub-project] Perfect cuboid

[Zak]

One of the face diagonals is divisible by 4, and I had every right to write: (defg)^2=16n^2. Is it clear?
Let's transform both last equations to the reduced form and try to determine the integer roots:

e3.JPG (66.32 KiB) 7337 mal betrachtet

Are you still in doubt?

[Zak]

x3mEn

e10.JPG (68.31 KiB) 7296 mal betrachtet

[Zak]

x3mEn
Hi! How are the searches going? In the project statistics, the progress so far seems to be unresultative... My own brutal force application still brought nothing too. May be this can be useful to you:

new.png (154.29 KiB) 6759 mal betrachtet

[Zak]

x3mEn
Hi
This link to my proof: http://wdfiles.ru/ikeQ
Can you chek it, please.

[Zak]

x3mEn
I already found that there is one case when left part of double inequality not performed. It is folowed that PC exists. Nevertheless thank you.

[Zak]

x3mEn
Hi!
The proof here: https://cloud.mail.ru/public/GaPF/KG3TGYoUD

[Nataly-Mak]

x3mEn
Hi!
The proof here: https://cloud.mail.ru/public/GaPF/KG3TGYoUD

An alle

Bitte bestätigen Sie diesen Nachweis.
Ist es richtig?

[Nataly-Mak]

Hier
https://dxdy.ru/post1552556.html#p1552556
die Beweise wurden bereits widerlegt.

PS. Entschuldigung, dieser Beitrag wurde gelöscht.