## Die Suche ergab 99 Treffer

18.07.2018 21:49
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

CodeCogs.gif Why do you never check your galactic hypotheses on practice? I guess you know the story about Landau and "farmatists": Landau was very much bothered by "farmatists" — dilettantes trying to prove Fermat's Great Theorem and get a major award for this proof. In order not to be distracted ...
30.05.2018 09:48
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

Let:
a = 448
b = 495
c = 840

f = sqrt(495^2+840^2) = 975
g = sqrt(448^2+495^2+840^2) = 1073

x = b^2+c^2-2a^2 = 495^2+840^2-2*448^2 = 549217
sqrt((3a^2+x)(2a^2+x)) = sqrt((3*448^2+549217)(2*448^2+549217)) = sqrt(1151329*950625) = sqrt(1046175^2) = 1046175

gf = 975*1073 = 1046175
27.01.2018 19:19
Forum: Number crunching
Thema: Question perfect cuboid
Antworten: 2
Zugriffe: 5427

### Re: Question perfect cuboid

Hi Lloyd, You are right, from the 2nd batch we've decided to focus on Perfect cuboid search only. There're several reasons for this step: 1) Refusal of checking all cases and focusing on searching exclusively a Perfect cuboid accelerates the program almost at 4 times (unfortunately the first estimat...
25.01.2018 16:43
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

Zak, I figured out how to show the absurdity of your "proof" d^2 = a^2 + b^2 Now I'll "prove" that the face diagonal d can never be integer. d = sqrt(a^+b^2), let's suppose d is integer, it's possible only when a^2+b^2 (1) is a full square: a^2+b^2=( expression )( expression ) Let's expression = m*a...
24.01.2018 22:37
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

No proof, no conclusions. It's just mind games.
24.01.2018 20:11
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

Ok, you don't know how to represent the product of four as a full square. And so what? Is it your proof, "I don't know how to express, so it can never be!" ? Yes, the product of four is a sixth-degree polynomial, you can easily make sure, if you open parentheses: CodeCogsEqn.gif Trying to express si...
24.01.2018 08:21
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

Your "proof" contains only d, e, f, g and m, n, k naturalness requirement and nothing about a, b, c I brought a counter-example where d, e, f, g are natural and natural m, n, k also exist, so your conclusion that d*e*f*g can never be natural is wrong. You hadn't explain in a proper way why a product...
23.01.2018 19:19
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

CodeCogsEqn9.gif (13.35 KiB) 4973 mal betrachtet
18.01.2018 22:52
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

CodeCogsEqn4.gif (3.55 KiB) 5098 mal betrachtet
So your conclusion that for given natural d, e, f and g there is no natural solution for m and n — completely wrong.
18.01.2018 22:23
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

Zak,
the only thing you achieved, you derived that for given natural d, e, f and g the next equation must be true:
CodeCogsEqn.gif (966 Bytes) 5099 mal betrachtet
Let's check for our already well-known Edge cuboid:
CodeCogsEqn3.gif (4.9 KiB) 5099 mal betrachtet
16.01.2018 09:47
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

CodeCogsEqn2.gif (1.68 KiB) 5316 mal betrachtet
16.01.2018 08:01
Forum: Fehler, Wünsche / Bugs, Wishes
Thema: [sub-project] Perfect cuboid
Antworten: 256
Zugriffe: 145496

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

CodeCogsEqn.gif (7.91 KiB) 5330 mal betrachtet