Correlation and causality: the Stork effect!

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reinoso
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Re: Correlation and causality: the Stork effect!




by reinoso » 03/02/21, 09:32

ABC2019 wrote:
But I do not see the relation with the equations of the 3rd degree.



it is impressive to present oneself as the only scientist of this forum and not to recognize a 3rd degree equation !!

1 + f + f ^ 2 = 1 / (1-f) is not equivalent to a: (1-f) x (1 + f + f ^ 2) - 1 = 0 !! (either a + bx + cx ^ 2 + dx ^ 3 = 0)?
I gave the solutions without knowing anything about the climate!
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Re: Correlation and causality: the Stork effect!




by ABC2019 » 03/02/21, 09:58

reinoso wrote:
ABC2019 wrote:
But I do not see the relation with the equations of the 3rd degree.



it is impressive to present oneself as the only scientist of this forum and not to recognize a 3rd degree equation !!

1 + f + f ^ 2 = 1 / (1-f) is not equivalent to a: (1-f) x (1 + f + f ^ 2) - 1 = 0 !! (either a + bx + cx ^ 2 + dx ^ 3 = 0)?
I gave the solutions without knowing anything about the climate!

oh there I wrote that last night I was not awake sorry, I wanted to write 1 + f + f ^ 2 + ... with three small dots to indicate that it is an infinite series (in fact it is necessary continue the sum + f ^ 3 + f ^ 4 etc ..., it would be necessary to write a sum of 0 to infinity but without a Latex type text editor it is not easy). There is an infinite sum because each feedback triggers another which triggers another one etc ... but each one diminished by a factor f. You have to f <1 otherwise it deviates catastrophically and this is where we have a runaway (but for the climate I reassure you we have af <1);

the sum of a geometric series, we studied that in high school in my time ...
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Re: Correlation and causality: the Stork effect!




by ABC2019 » 03/02/21, 10:01

PS if you limit yourself to a finite number of terms as in the equation you wrote, the only solution is f = 0. there is also no need to use Cardan's formula, because we can easily factorize the f and there remains a quadratic equation which has no solution, so only f = 0 works.

You should not venture into areas that you obviously only master very roughly ...
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Re: Correlation and causality: the Stork effect!




by reinoso » 03/02/21, 10:52

ABC2019 wrote:
You should not venture into areas that you obviously only master very roughly ...


obviously for the greatest scientist of the forum you are very very approximate!
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Re: Correlation and causality: the Stork effect!




by GuyGadeboisTheBack » 03/02/21, 12:33

ABC2019 wrote:ouh there I wrote that last night I was not well awake sorry, I wanted to write 1 + f + f ^ 2 + ....

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Re: Correlation and causality: the Stork effect!




by Christophe » 03/02/21, 18:32

reinoso wrote:obviously for the greatest scientist of the forum you are very very approximate!


Ah yes !!! Surely that's why I don't understand anything about his bargaining? : Lol: : Lol: : Lol:
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Re: Correlation and causality: the Stork effect!




by ABC2019 » 03/02/21, 19:02

Christophe wrote:
reinoso wrote:obviously for the greatest scientist of the forum you are very very approximate!


Ah yes !!! Surely that's why I don't understand anything about his bargaining? : Lol: : Lol: : Lol:

very approximate because I wrote 1 + f + f ^ 2 instead of 1 + f + f ^ 2 + ...? yeah .. sorry ... i shouldn't go into these details ... but feel free to ask if you don't understand i can explain again :).
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Re: Correlation and causality: the Stork effect!




by GuyGadeboisTheBack » 03/02/21, 19:17

ABC2019 wrote:but don't hesitate to ask if you don't understand, I can explain again :).

Valérie Lemercier has already answered you. : Mrgreen:
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