Seven qubits protecting a qutrit: does a ((7,3,3)) code exist?
Find a three-dimensional subspace of seven qubits that corrects any single-qubit error, or prove that no ((7,3,3)) code exists.
Comparing changes
Choose two branches to see what changed, then open a pull request to bring the work across.
Pick two different branches
A pull request can go from any branch into any other.