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Rename "sparsity" to "feature density" in order to clarify its true meaning#2

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Rename "sparsity" to "feature density" in order to clarify its true meaning#2
NegevTag wants to merge 2 commits intowattenberg:mainfrom
NegevTag:change-density-sparsity-defenition

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@NegevTag NegevTag commented Feb 20, 2026

Rename "sparsity" to "feature density" in order to clarify the true meaning the parameter (opposite from the paper Toy models of superposition) and explained the relationship with the paper's parameter when introducing this parameter.

Also rename s to d to much the change across code and markdown

On markdowns changes have been done with caution, In order to understand when sparsity means feature density, and when it means actual sparsity. When it meant actual sparsity reversed the meaning of the claim (when sparsity increase -> when feature density decrease)

Additionally bugfix 2 headlines error in "3d view" section

Closes #1

…from paper) and clarified this part, also bugfix 2 headlines error in 3d view
@NegevTag NegevTag changed the title Rename sparsity to feature density in order to clarify its true meaning Rename sparsity to feature density in order to clarify its true meaning Fixes #1 Feb 20, 2026
@NegevTag NegevTag changed the title Rename sparsity to feature density in order to clarify its true meaning Fixes #1 Rename sparsity to feature density in order to clarify its true meaning Feb 20, 2026
@NegevTag NegevTag changed the title Rename sparsity to feature density in order to clarify its true meaning Rename "sparsity" to "feature density" in order to clarify its true meaning Feb 20, 2026
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sparsity definition inverted

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