# Multilinear Maps of V^n into Reals and Effect of Linear Transforma

1. Dec 28, 2013

### WWGD

Hi, All:

Is there a "nice" , non-messy way of showing this:

Let $M(v_1,v_2,..,v_n) → R+$, where R is the Reals, be a multilinear map,

where $v_i$ are vectors in a finite-dimensional vector space V.

Now, let $L: Vn → Vn$ be a linear map with Det(L)>0 .

How do we show that $M(L(v_1,v_2,..,v_n))($ is also strictly-positive? I think it

has to see with the fact that the map L preserves the orientation of $Vn$,

but I don't see how to make this more rigorous. Any ideas?

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