# Question:unevaluated/inert Matrix-Vector product?

## Question:unevaluated/inert Matrix-Vector product?

Maple 2021

Can Maple carry around an unevaluated/inert  Matrix-Vector product(A matrix product without executing the matrix multiplication)? See Maple sheet.

inert_matrix_products.mw

Can Maple carry around an unevaluated/inert explicit Matrix-Vector product?

Define a matrix K and vector U as:

 (1)

 (2)

I can take their product using MatrixVectorMultiply( ) I get,

 (3)

however output I am really looking for is

In the later case,  is still a product however the actual matrix multiplication is not carried out. Sure, eventually I will want to evaluate the matrix-vector product but sometimes when setting up a problem I want to look at the explicit matrix equation before any explicit matrix multiplication is carried out.

Here I show some ideas that don't work but may give a sense of what I am going for. I am essentially trying to mute the computation of the product while keeping the elements of the product together for further substitutions elsewhere. This there a standardized way to complish this? Or do I have to write my own procedure for something like this?

 (4)

 (5)

 (6)

 (7)