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/sci/ - Science & Math


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4503884 No.4503884 [Reply] [Original]

i want to tattoo the string theory equation, but having a hard time finding it on google. can anyone help?

>> No.4503902
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4503902

bump for physics!

>> No.4503905

e = mc*2

There you go.

>> No.4503915

>>4503905
that's not right,

>> No.4503922

>>4503915
It is. It's like the first thing you learn in physics.

>> No.4503926
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4503926

>> No.4503935

there isnt one, they are still constructing it. you can do the Lagrangian of some parts of string theory though.
like a relativistic, unquantized string: (Nambu–Goto action):
<div class="math"> \mathcal{S} = -\frac{T_0}{c} \int \mathrm{d}^2 \Sigma \sqrt{(\dot{X} \cdot X')^2 - (\dot{X})^2 (X')^2}</div>

or the Polyakov action, the two-dimensional action of a conformal field theory describing the worldsheet of a string in string theory.
<div class="math">\mathcal{S} = {T \over 2}\int \mathrm{d}^2 \sigma \sqrt{-h} h^{ab} g_{\mu \nu} (X) \partial_a X^\mu (\sigma) \partial_b X^\nu(\sigma) </div>

>> No.4503948

>>4503935
Why anybody would want to tattoo various equations from a "theory" that's closer to a random collection of ideas at this point is beyond me though....

>> No.4503954

>>4503884
if you have to google it, you shouldn't tattoo it

>> No.4503957

I'd jokingly type up the String equation, but it's too fucking long for me to bother.

>> No.4503976

>>4503884
do the yang mills equation if you want something, its the generalization of the Maxwell equations in quantum field theory and at the moment describes 3/4 of the forces.
<div class="math"> \ \mathcal{L}_\mathrm{gf} = -\frac{1}{4}\operatorname{Tr}(F^2)=- \frac{1}{4}F^{\mu\nu a} F_{\mu\nu}{}^a </div>
<div class="math"> \ F_{\mu \nu}{}^a = \partial_\mu A_\nu{}^a-\partial_\nu A_\mu{}^a+gf^a{}_{bc}A_\mu{}^bA_\nu{}^c </div>
<div class="math"> \ [T_a,T_b]=if^{abc}T_c </div>

>> No.4503983

>>4503976

<div class="math"> \ \mathcal{L}_\mathrm{gf} = -\frac{1}{4}Tr(F^2)=- \frac{1}{4}F^{\mu\nu a} F_{\mu\nu}{}^a</div>

>> No.4504011

>>4503884

Enjoy regretting your decision for the remainder of time and never getting a job.

>> No.4504093

>>4503922
It's e = mc^2