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defines the fraction of local Jeans length to be resolved by one
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grid cell. A zero or negative value means that the
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Jeans-length-based criterion is disabled.
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$y=10^{-7}$
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- `_C.amr_dJeans` ($\ge 0$): tuning parameter for the
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Jeans-length-based mesh refinement criterion allowing a
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- $l$ *`_C.amr_dJeans`, i.e., the local Jeans length becomes
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gradually higher resolved with incresing $l$. `_C.amr_dJeans`
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must be positiv.
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$y=10^{-7}$
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**Important**: `_C.amr_dJeans` must be chosen with care such
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that the actual Jeans threshold never becomes too small or
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