Left matrix division

[DrD]

(12-17-2018 01:49 PM)ijabbott Wrote:  

(12-16-2018 09:44 PM)Carlos295pz Wrote:  Matlab A*x = B → x = A\B
HP Prime A*x = B → x = B/A

Matrix multiplication is noncommutative, so you can't just reverse the positions of A and B like that.

For square matrices A and B (of the same size), Matlab's A\B is roughly equivalent to A⁻¹B, and A/B is roughly equivalent to AB⁻¹ (like on HP Prime), although Matlab supports left and right division of non-square matrices too.

I was trying to inspire enthusiasm for the use of the backslash symbol as a short hand for this purpose. While not directly on a key face, it is available via the [Chars] menu. My track record for successful suggestions, hasn't been very productive, so I doubt this will be any different, but, with enough merit, and interest, one never knows!