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Kapittel 1 · Vektorromvector spaces

Dimension: How Many Free Directions?

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Dimension as a count of linearly independent directions — a single arrow gives a line (dim 1), a second non-collinear arrow sweeps out a plane (dim 2), and a third arrow off the plane fills three-dimensional space (dim 3).

dimensionbasisspanlinear independenceR^n
ForutsetterSpan and Linear Dependence
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