Giorgio Gilestro
f5f68f5249
A new analytic experiment on an orthogonal evolution-of-sex axis: not the recombination RATE (E9) but the population's mating STRUCTURE. Agents on a ring recombine with a second parent drawn from a window of breadth b (b->0 monogamous/isolation-by-distance, b=1 promiscuous/panmictic), under local selection, swept against NK ruggedness K. Finding: the optimal mate-pool breadth SHRINKS as skills get more entangled. Wide/promiscuous merging wins the champion on additive landscapes (K<=3, b=0.6), but on rugged ones (K>=6) it prematurely converges to a worse champion and an intermediate breadth (b~0.35) wins; pure monogamy over-fragments. Throughout, promiscuity monotonically lifts the population MEAN but destroys diversity and parallel exploration. The design rule extends E9: merge widely for additive skills, keep island-structured sub-populations for entangled ones — a merging-native axis the panmixia-assuming literature lacks. - src/knowledge/mating_system.py + experiment.py dispatch (kind: mating_system) - configs/layer1/E14.yaml (breadth x K sweep, 20 reps, bitwise-reproducible) - figures/plot_E14.py; results/E14/ (figure, README, manifest, resolved config) - tests/test_mating_system.py (+5, 147 green); make layer1 wired - folded into both papers (full + accessible) as the third §5 result Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
33 lines
455 B
YAML
33 lines
455 B
YAML
experiment: E14
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seed: 20260709
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n_replicates: 20
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source_config:
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experiment: E14
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kind: mating_system
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seed: 20260709
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n_replicates: 20
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mating:
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L: 12
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N: 48
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breadth: 1.0
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K: 0
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recomb_rate: 0.5
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mu: 0.003
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generations: 60
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sweep:
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- param: mating.K
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values:
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- 0
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- 3
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- 6
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- 10
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- param: mating.breadth
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values:
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- 0.03
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- 0.08
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- 0.17
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- 0.35
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- 0.6
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- 1.0
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output:
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dir: results/E14
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