- #1
Petar Mali
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I need help in understanding this problem.
Equation of sphere in n-dimensional space is:
[tex]x^2_1+x^2_2+...+x^2_n=R^2[/tex]
We serch volume as [tex]V=C_nR^n[/tex]. Why? Perhaps its analogy with [tex]CR^3[/tex].
Now we calculate this integral
[tex]I=\int^{\infty}_{-\infty}dx_1\int^{\infty}_{-\infty}dx_2\int^{\infty}_{-\infty}dx_3...\int^{\infty}_{-\infty}dx_ne^{-a(x^2_1+x^2_2+...+x^2_n)}[/tex]
Why we do this?
And we get [tex](\frac{\pi}{a})^{\frac{N}{2}}[/tex]
And then
[tex]I=\int dV_n e^{-ar^2}[/tex]
we get
[tex]V_n=\frac{(\pi)^{\frac{N}{2}}}{\Gamma(\frac{N}{2}+1)}R^n[/tex]
Can someone tell me idea of all this. Thanks
Equation of sphere in n-dimensional space is:
[tex]x^2_1+x^2_2+...+x^2_n=R^2[/tex]
We serch volume as [tex]V=C_nR^n[/tex]. Why? Perhaps its analogy with [tex]CR^3[/tex].
Now we calculate this integral
[tex]I=\int^{\infty}_{-\infty}dx_1\int^{\infty}_{-\infty}dx_2\int^{\infty}_{-\infty}dx_3...\int^{\infty}_{-\infty}dx_ne^{-a(x^2_1+x^2_2+...+x^2_n)}[/tex]
Why we do this?
And we get [tex](\frac{\pi}{a})^{\frac{N}{2}}[/tex]
And then
[tex]I=\int dV_n e^{-ar^2}[/tex]
we get
[tex]V_n=\frac{(\pi)^{\frac{N}{2}}}{\Gamma(\frac{N}{2}+1)}R^n[/tex]
Can someone tell me idea of all this. Thanks