[Numpy-discussion] Plans for new sparse compilation backend for PyData/Sparse

Hello everyone, The stated goal for sparse is to provide a NumPy-like API with a sparse representation of arrays. To this end, Quansight and I have been collaborating with researchers at MIT CSAIL - in particular Prof. Amarasinge's group

[Numpy-discussion] Re: Change definition of complex sign (and use it in copysign)

sign(z) = z/|z| is a fairly standard definition. See https://oeis.org/wiki/Sign_function and https://en.wikipedia.org/wiki/Sign_function. It's also implemented this way in MATLAB and Mathematica (see https://www.mathworks.com/help/symbolic/sign.html and https://reference.wolfram.com/language/ref/Si