Hi All, I've been looking to implement the "@" operator from Python 3.5. Looking at the current implementation of the dot function, it only uses a vector inner product, which is either that defined in arraytypes.c.src or a version using cblas defined in _dotblas for the float, cfloat, double, cdouble types. I note that the versions defined in arraytypes.c.src include all the numeric types plus boolean, datetime, timedelta, and object. I'm not clear why datetime and timedelta should have dot products, except perhaps for scalar multiplication. The boolean version has the advantage that it can short circuit. I also note that all the operations proposed for "@" can easily be done with einsum except for objects. So I'm wondering if one easy way to implement the functions is to extend einsum to work with objects and make it use blas when available. Another thing that may be worth looking into would be some way to multiply by the complex conjugate, as that is easy to implement at the low level. I'd welcome any thoughts as to how that might be done. Anyway, I'm just looking for a discussion and ideas here. Any input is welcome. Chuck