'sparsity' is a correct and usable word in written English.
It means a lack or scarcity of something, particularly something desirable. You could use it in a sentence such as, "The sparsity of public transportation in this area makes it difficult to get around."
Exact(60)
But sparsity of evidence is not evidence of sparsity.
She attributes the sparsity of gigs to a sagging economy.
The knitwear, the sparsity, the absence of bagpipes: it all adds up.
And there are, of course, enormous differences in terms of geographical size and population sparsity.
Elsewhere, as on 110%, its almost unfathomable how such lightness of touch and sparsity could produce such an absolute banger.
Taking sparsity into account, this section develops sparsity-cognizant trackers.
L 0 Analysis-based sparsity.
Here, sparsity level K=20.
Fast sparsity adaptive matching pursuit.
(iv) New results on recoverable sparsity.
The sparsity rate was set to 0.1.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com