Two vectors uuu and vvv are linearly dependent if:
∣∣u∣∣=∣∣v∣∣||u|| = ||v||∣∣u∣∣=∣∣v∣∣
u×v=0u \times v = 0u×v=0
u⋅v=0u \cdot v = 0u⋅v=0
u=kvu = kvu=kv for some scalar kkk