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Multivector

From Wikipedia, the free encyclopedia

In a Grassman algebra, a multivector is an element of a vector space V. A k-multivector is a k-fold product v_1\wedge\cdots\wedge v_k, where \wedge denotes wedge product and the k-th exterior power, Λk(V), is the vector space of formal sums of k-multivectors. The product of a k-multivector and an \ell-multivector is a (k+\ell)-multivector. So, the direct sum \bigoplus_k \Lambda^k(V) forms an associative algebra, which is closed with respect to the wedge product. This algebra, commonly denoted by Λ(V), is called the exterior algebra of V.

In geometric algebra, multivectors are defined to be summations of such k-blades such as the summation of a scalar, a vector, a 2-vector.

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