Eventually, Emmett worked out that the solution was for the Hamiltonian operator to equal H, which meant that H to the A multiplied by the inverse of H could only be the same as the expectation value for A.
By 1986, Doc considered Ivanov's Conundrum easy to solve.
When Marty McFly traveled back to 1931 and needed to convince Emmett that he was interested in science, Doc told Marty the solution to Ivanov's Conundrum and told him to relay it to his younger self. Now convinced of Marty's authenticity, the younger Emmett agreed to help with the construction of the rocket-powered drill.
Behind the scenes
- The conundrum is fictional and does not exist in real life. Based on Emmett's description, the solution to the conundrum may have looked like this:
HA * H−1 = A