Extensors

I'm familiar with tensors, but I recently encountered in a physics paper the term "extensor" (specifically, the "metric extensor" as constrasted with the metric tensor). What is an extensor? Can anyone point me to a definition or introduction to this term/concept/entity?

--Kevin C.

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Originally Posted by TwistedOne151

I'm familiar with tensors, but I recently encountered in a physics paper the term "extensor" (specifically, the "metric extensor" as constrasted with the metric tensor). What is an extensor? Can anyone point me to a definition or introduction to this term/concept/entity?

--Kevin C.

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let be a vector space over a field (or more generally a module over a commutative ring). let be the exterior algebra of over an extensor of step is any element of

in the form