# What is the name of a tensor product?

I have a tensor like

```
tensor([a,b,c])
```

where a, b, c lie in some CombinatorialFreeModule. Where (in Sage syntax) does this tensor lie? (I need to know, because I am writing a function using module_morphism, and it requires me to explicitly specify its codomain.)

Writing

```
type(tensor([a,b,c]))
```

doesn't help (it just gives generic trash).

What does `parent(tensor([a,b,c]))` say?

It says, in my case, "The Malvenuto-Reutenauer Hopf algebra over <class 'sage.interfaces.r.r'=""> # The Malvenuto-Reutenauer Hopf algebra over <class 'sage.interfaces.r.r'="">". I wish it would just give me the damned type name...

?! Something's gone horribly wrong. That "R" isn't the R of the reals, it's the R of the statistical package.

It's supposed to be QQ (the rationals)... and I have no idea how the R package could have entered the picture. Here is the part of the code necessary to reproduce the mess: http://mit.edu/~darij/www/wtf.htm / http://mit.edu/~darij/www/wtf.sws

PS. I have taken the tensor of two rather than three elements to simplify the situation.