Octahedron in Cube: Proving the Possibility

  • Thread starter Thread starter BrianKim
  • Start date Start date
  • Tags Tags
    Cube
BrianKim
Messages
3
Reaction score
0
I heard somewhere that the Octahedron can't exist in the Cube exactly.

Is this true? Can't I prove that the octahedron in the cube?

Intuitively, they seems true. But I can't sure.
 
Mathematics news on Phys.org
Your question is not at all clear.
 
Octahedron_in_Cube.png
I meant this. I heard that this octahedron don't exist. But...
 
You are both drawing something and telling us it can't exist. Doesn't that bother you?
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »
Thread 'Imaginary Pythagorus'

Thread 'Imaginary Pythagorus'

I posted this in the Lame Math thread, but it's got me thinking. Is there any validity to this? Or is it really just a mathematical trick? Naively, I see that i2 + plus 12 does equal zero2. But does this have a meaning? I know one can treat the imaginary number line as just another axis like the reals, but does that mean this does represent a triangle in the complex plane with a hypotenuse of length zero? Ibix offered a rendering of the diagram using what I assume is matrix* notation...
View full post »

Similar threads

B What would need to be possible to make a cube of circles?
Replies
4
Views
1K
Truncated Octahedron formulas -- How to publish an article?
Replies
5
Views
1K
I A way to comprehend the geometry of a hypercube
Replies
2
Views
2K
Constructing a cube with a Norm
Replies
1
Views
2K
How Can We Quantify the Concept of 'Sameness' in Mathematics?
Replies
1
Views
2K
B Volume of a Cube: Definition & Explanation
Replies
7
Views
5K
MHB [ASK] Find the volume of Pyramid in a Cube
Replies
6
Views
2K
MHB Can I Use the Difference of Cubes Formula for Factoring 27 - (a - b)^3?
Replies
5
Views
2K
What Does Mathematical Sameness Mean?
Replies
7
Views
3K
Insights Fermat's Last Theorem
2
Replies
91
Views
6K

Hot Threads

Recent Insights

Back
Top