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Vectors may also be multiplied by a number. The productof the vector a by the number λ is defined as the vector a λ=λa, the absolute value of which is obtained by multiplying theabsolute value of the vector a by the absolute value of thenumber λ, i. e. |λa|=|λ||a|, the direction coinciding withthe direction of the vector a or being in the opposite sensedepending on whether λ>0 or λ<0. If λ=0 or a=0, then λ a
Vectors may also be multiplied by a number. The product of the vector a by the number λ is defined as the vector a λ=λa, the absolute value of which was obtained by multiplying the absolute value of the vector a by the absolute value of the number λ , ie |λa|=|λ||a|, the direction coinciding with the direction of the vector a or being in the opposite sensedepending on whether λ>0 or λ<0. If λ=0 or a=0, then λ a