Review set

What a relaxation bound establishes

The questions give you a relaxation value, sometimes with a candidate plan beside it, and ask what follows. The bound's direction returns quickly; keeping it apart from an achievable value, and refusing the rounding that always looks available, is what needs practice.

What this involves

2 questions, chosen for youHints availableNo time limit

Retrieval after a delay, which is what makes knowledge durable.

Answers here count towards what the system knows about your skills.

Start review set

What this covers

  • Use a linear relaxation as a bound

    Given an integer program, the learner can form its linear relaxation, state the direction of the bound its optimum provides, use the bound to judge how far a candidate integer solution can be from optimal, draw the inferences an infeasible or integral relaxation licenses, and explain why rounding is not a solution method.

Results update as you type. Use the up and down arrow keys to move between results, Enter to open one, and Escape to close.

Type to search.

Settings

Appearance

Interface density

Your record

Your progress is stored in this browser and nowhere else: an identifier, the answers you have given, the mastery states and review schedule derived from them, and the lesson you last opened. Clearing it makes you a new learner on this device. It cannot be undone, and it will not affect your appearance or density settings.

Focus timer

Focus--minutes remaining

Phase

Kept in this browser only, and used to label the session in your own history.

Today

Nothing recorded yet. Finish a focus session and it will appear here.

Settings

Focus sessions between long breaks.

Sessions you are aiming for in a day.

Notifications

Your history

Sessions are stored in this browser and nowhere else. They are not evidence and never reach your mastery record.