Functions defined on both Base and SpecialFunctions.jl? about specialfunctions.jl

[ararslan]

Note that erf(1.0) will not work in Julia 0.6 and later without using SpecialFunctions. The reason why Base.erf works after loading SpecialFunctions is that the package overwrites the deprecation. That is, it extends Base.erf to provide the methods that used to be defined in Base. When the deprecation is removed from Base, calling Base.erf will no longer work, and instead the symbol is defined in the package rather than extending the symbol in Base. That's all implementation details though; as long as you've done using SpecialFunctions, you can call erf directly no matter what version of Julia you're using.

[BoundaryValueProblems]

Thanks a lot for your explanation, @ararslan !!
I'll close this issue then.