/sci/ - Science & Math » Thread #12879621

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WHAT'S GOING ON

Anonymous Thu 25 Mar 03:55:01 2021 No.12879621 View Reply Original Report

Quoted By: >>12879643 >>12879696 >>12879973 >>12880738 >>12880857 >>12880892

IM FEELING MYSELF BE FILTERED WHAT THE FUCK IS THIS

Anonymous

Anonymous Thu 25 Mar 2021 03:57:26 No.12879629 Report

Quoted By:

damn nigga thats some ancient egyptian algebra

Anonymous

Anonymous Thu 25 Mar 2021 04:03:15 No.12879640 Report

Quoted By:

analytical mechanics retard

Anonymous

Anonymous Thu 25 Mar 2021 04:04:44 No.12879643 Report

Quoted By:

>>12879621
It's an identity, you only need the beginning and end

Anonymous

Anonymous Thu 25 Mar 2021 04:33:21 No.12879696 Report

Quoted By:

>>12879621
it's just integration by parts bro

Anonymous

Anonymous Thu 25 Mar 2021 04:37:49 No.12879711 Report

Quoted By:

looks like a derivation of the euler lagrange equations

Anonymous

Anonymous Thu 25 Mar 2021 06:36:28 No.12879973 Report

Quoted By:

>>12879621
Not sure about the first step since not enough context was given but the rest is just integration by parts.

bbbbbbbbbb

bbbbbbbbbb Thu 25 Mar 2021 11:22:31 No.12880738 Report

Quoted By:

>>12879621
kinda looks like euler-lagrange to me https://youtu.be/VCHFCXgYdvY

Anonymous

Anonymous Thu 25 Mar 2021 12:10:57 No.12880857 Report

Quoted By: >>12880894

>>12879621
Ok listen here you dumb nigger.
First row, you apply chain rule on Lagrangian which is a function of f and its derivative with respect to x. eha is just df/depsilon and eta' is d/dx of df / depsilon.
Second row, apply paroduct rule on part with eha' and you get d/dx (part with Lagrangia * eta) - eta * (part with Lagrangian). Do integration on first of these terms and woala you get the result.

Anonymous

Anonymous Thu 25 Mar 2021 12:27:44 No.12880892 Report

Quoted By:

>>12879621
Variational calculus, and the Euler-Lagrange equations.

A lot of the resources and textbook derivations on this are technically correct, but insufficient.

They don't define or explain the variables or how they are used properly, most of them use the exact same notation and declare the exact same things, so they seem to be copies of the same derivation where the author did not care to properly think about what he was copying.

Just look for different resources, there are some good ones, go through it step by step and give it some time.

Anonymous

Anonymous Thu 25 Mar 2021 12:28:11 No.12880894 Report

Quoted By: >>12881269

>>12880857
Ask me how I know you post on plebbit.
Go back, faggot.

Anonymous

Anonymous Thu 25 Mar 2021 14:40:23 No.12881247 Report

Quoted By:

why aren't they cancelling those 2's and d's

Anonymous

Anonymous Thu 25 Mar 2021 14:45:53 No.12881269 Report

Quoted By:

>>12880894
>Ask me how I know you post on plebbit.
How?

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