Hi,
I’m running Unity 2018.2.7f1 and I have the Mathematics package installed (as well as Burst, Collections, Entities and Jobs) but in VS I can’t find Unity.Mathematics…
A picture of the problem in an empty project :
Anyone has an idea ?
Why using statics Unity.mathematics? Remove it. Should solve the issue.
Because it’s what is recommanded on Mathematics github.
But it doesn’t solve the problem 
Oh is it? Didn’t notice that. I need double check.
While you have Entities, try uninstall math package and see what happens.
Entities come with own mathematics. Unless you looking for specific functions?
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Thanks a lot, it works !
Well it compiles but in VS the error is still displayed…
And I get this message in the unity console when I reopen the project
Rebuilding Library because the asset database could not be found!
Did you add Unity.Mathematics as a dependency in your Fish assembly definition file?
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Try reimport all.
I normally reimport all, after changing anything with packages. I found Unity otherwise chokes. 
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