## Die Suche ergab 99 Treffer

30.10.2018 20:52
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Zak,
CodeCogsSEFX2.gif (2.42 KiB) 2517 mal betrachtet
29.10.2018 22:33
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Zak,
CodeCogsSEFX.gif (1.28 KiB) 2564 mal betrachtet
27.10.2018 16:42
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Zak,
CodeCogsDEFX.gif (10.55 KiB) 2645 mal betrachtet
25.10.2018 20:57
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

x3mEn I know about you had showed. But I told about other equation whith new integer variable x, which included sqr(16a^2b^2c^2g^2). The equation will be TRUE only in case when d,e,f will correspond perfect brick's face diagonals. By means of transformations and finding the roots of the equation, w...
25.10.2018 15:14
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Decision of equation in integers will be equal to full task, because if we will have d,e,f , then we can find all the rest. We can find g and then we can find a,b,c. You are not right. When you have a system of Diophantine X equations with Y variables, theoretically you can simplify it to an equati...
25.10.2018 08:40
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

the fourh exponent is not too big? It's time to talk about how Math works. :) With the help of strict math logic of equivalent expressions you transfered from the given system of 4 Diophantine equations to consequent (and, btw, not necessary equivalent to input system) expression, which says: "If t...
24.10.2018 21:41
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Zak, you are muddling up 'necessary' and 'enough'. If undersquare expression is 2f^2e^2, yes, it's enough to aquire z as a full square of the sum or the difference of f^2 and e^2. But, is it necessary? No. There are a lot of other expressions binding f and e which are a full square too. The world is...
23.10.2018 21:17
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Some ideas regarding the last equation. As far as One edge, two face diagonals and the body diagonal must be odd, one edge and the remaining face diagonal must be divisible by 4, and the remaining edge must be divisible by 16. Two edges must have length divisible by 3 and at least one of those edges...
23.10.2018 09:57
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Zak, no problem, buу Wolfram|Alpha Pro to get the proof.
21.10.2018 21:05
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

CodeCogs3.gif (12 KiB) 2319 mal betrachtet
17.10.2018 15:49
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

Perfect Cuboid 3rd (loooooong) Batch has finished If a perfect cuboid exists, its body diagonal exceeds 2^53. During this batch we were investigating the range of body diagonal from 2^51 (2'251'799'813'685'248) to 2^53 (9'007'199'254'740'992). 17'408 face cuboids, 34'816 imaginary cuboids, 156'672 t...
05.10.2018 18:16
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 118064

### Re: [sub-project] Perfect cuboid

I decided to open source of Perfect Cuboid subproject today! First, `cause the 3rd Batch is close to the end, Second, `cause today's friday, the weekend begins and a lot of people have free time. So....... the source code is here: https://github.com/renyxadarox/pcuboid Everyone who is interested to ...