The algebra runs out, so you stop.
A proof closes with a sentence saying what is proved and why. In a contradiction, name the two things that cannot both hold; in an induction, say the result follows.
Next time: Write the closing sentence.
The algebra runs out, so you stop.
A proof closes with a sentence saying what is proved and why. In a contradiction, name the two things that cannot both hold; in an induction, say the result follows.
Next time: Write the closing sentence.