Fig. 3-10 illustrates the inelastic collision of two particles from a relativistic perspective. The time components ⁠ E 1 / c ⁠ and ⁠ E 2 / c ⁠ add up to total E/c of the resultant vector, meaning that energy is conserved. Likewise, the space components ⁠ p 1 ⁠ and ⁠ p 2 ⁠ add up to form p of the resultant vector. The four-momentum is, as expected, a conserved quantity. However, the invariant mass of the fused particle, given by the point where the invariant hyperbola of the total momentum intersects the energy axis, is not equal to the sum of the invariant masses of the individual particles that collided. Indeed, it is larger than the sum of the individual masses: ⁠ m > m 1 + m 2 ⁠.