Prof Lutzla biologie comme support théorique du socialisme https://www.youtube.com/watch?v=8LaIsAlssaU (il faut coopérer pour survivre: les rapports de compétition et de prédation ne sont pas les plus déterminants dans les écosystèmes)
YouTube
Nadiah KristensenMy #introduction keywords: #academic #modelling #evolution #cooperation #gameTheory #ecology #appliedMathematics
I'm a #postdoc specialising in evolutionary and ecological modelling, currently at #QUT and #GriffithUni in #Australia
Previous work: #evolutionOfCooperation, estimating undetected #extinctions, #qualitativemodelling, migratory #phenology, #foodweb #modelling, local #adaptation, #carryover effects, #dispersal.
My blog: https://nadiah.org/
Why is altruism more common in nature than spite? This new paper gives a general mathematical explanation: the degree of negative assortment that can be achieved is constrained in a way that positive assortment is not, particularly in unbalanced populations.
https://www.sciencedirect.com/science/article/pii/S0040580925000668
Analytic solution for the stationary distribution of actions taken in iterated games with implementation errors, and code to automate the solution in SymPy.
Analytic solution for the stationary distribution in an iterated game with implementation errors
For the past year, I’ve been working in my spare time through a very interesting paper by Kleshnina et al. (2023). The paper concerns an evolutionary game theory model where individuals play an iterated Prisoner’s Dilemma with an environmental feedback. In a previous post, I experimented with a method to automate the identification of the subgame-perfect Nash equilibria and their parameter-value conditions. In this post, I’ll show how the stationary distribution of actions taken during a repeated interaction can be found analytically and solved algorithmically using SymPy.
I recently read a paper by Kleshnina and others and used it to teach myself some evolutionary game theory techniques.
This is a little obscure, so I'll thread below about why this topic matters for humans and the environment 🧵
https://nadiah.org/2024/11/20/kleshnina_2023
#GameTheory #PrisonersDilemma #iteratedGame #cooperation #EvolutionOfCooperation #Z3 #pyeda #networkx #sympy #SageMath #sustainability
Check if an iterated Prisoner’s Dilemma strategy is a subgame perfect Nash equilibrium
I recently read a paper by Kleshnina et al. (2023), The effect of environmental information on evolution of cooperation in stochastic games, which provided an opportunity to teach myself about how to analyse iterated games. In particular, the problem they investigated admits 64 possible scenarios with 256 possible strategies each, and I was interested in writing code that could automate the analysis. The solution I eventually landed on (Github repo) used a combination of SymPy, NetworkX, SageMath, the Z3 Theorem Prover, and PyEDA for Boolean minimisation, but I think my approach could be improved.
Martin & Lessard (2024) find that assortment generally increases the fixation probability of Cooperation (C), but not if payoffs are multiplicative such that a Defector receives a much larger payoff than C in groups containing a very large number of C individuals.
https://www.sciencedirect.com/science/article/pii/S0022519324001759
Chairman Meow ᓚᘏᗢ 🐿️🍉I'm gonna have to read it more carefully but at first glance this looks like it might be an #EvolutionOfCooperation ground-breaker.
It's worth mentioning that the first thing that occurred to me when I saw this is that money serves this same same social purpose of creating "artificially amplified" incentives for cooperation within a population, but modeling a shared currency as a special case of institutions is actually a better, more generic way to look at it!
Radical AnthropologyFREE community #fediscience, please boost!
TONIGHT!!
Everybody is welcome!
Tuesday March 12 6:30pm London time
we have #ShaktiLamba
'Building Well Together'
This is a study of #mutualaid and the #commons in an #Indian Forest-living community with #biologist, #anthropologist and #ecologist Shakti Lamba.
FREE, LIVE @UCLAnthropology and on ZOOM (details below 👇)
http://radicalanthropologygroup.org
Shakti will be speaking in the Daryll Forde Seminar Room, 2nd Floor of the Anthro building. Please use main entrance of the Archaeology Institute in Gordon Square and someone will help direct you across to the Anthro building.
Before her talk, we have a video exhibition documenting the well-building community project, from 5:45 to 6:30pm in Room 129, 1st Floor of UCL Anthro building (underneath Daryll Forde).
#huntergatherers #India #evolutionofcooperation #anthropology
I'm not a fan of Dominic Johnson's Supernatural Punishment Hypothesis. Not actively hostile to it or anything, but it seems kind of just-so as anthropology, and it's even less plausible as a driver of genetic selection.
Anyway TIL that an IPD agent model they did in 2016 to demonstrate it didn't even show the expected selection strength "in silico" and I have to admit I found that funny. 😀 #EvolutionOfCooperation