Check if Sym-type is zero: Define iszero
davidschlegel opened this issue · comments
Currently, iszero(x) of a SymbolicUtils.Sym x is equal to x==0. This however does not give a boolean, but rather defines an equation. For this type, would it be more adequate to define Base.iszero(x::SymbolicUtils.Sym) = x===0 ?
This would also fix #6 so that symbolic numbers work with SparseArrayKit.jl.