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 ...
To pass for an idiot in the eyes of a fool is a gourmet pleasure. (Georges COURTELINE)
Mééé denies nui went to parties with 200 people and was not even sick moiiiiiii (Guignol des bois)