⚫️ Dot-product §

= the difference between two vectors in terms of angle AND magnitude (= 📏 Vector length

Formula §

$\vec{v}\cdot \vec{w}={\sum }_{i=1}^N{v}_i{w}_i=v_1{w}_1+v_2{w}_2+\dots +v_N{w}_N$

• $v$: vector 1
• $w$: vector 2

Meaning §

• Dot-product = 0 → orthogonal vectors
• Large dot-product: similar vectors

🔗 Links

📐 Cosine similarity