The property of any field with a conjugate to remain symmetrical from inner products. ⟨β∣α⟩=⟨α∣β⟩ Example β=(2+i,3−i), α=(1−i,2+i) ⟨β∣α⟩=∑i=1nβiαi=(2+i)(1+i)+(3−i)(2−i)=8−2i ⟨α∣β⟩=∑i=1nαiβi=(1−i)(2−i)+(2+i)(3+i)=8+2i=8−2i