RecallWeave · proof workshop

A base. A bridge.
Every integer.

Explore mathematical induction by comparing an arithmetic sum with a proposed formula. Inspect the exact starting case and the algebra that must carry every case to the next.

Works offline · exact arithmetic

Choosing an example checks it immediately. Change any coefficient to make your own conjecture, then check it explicitly.

1. State the conjecture

Let S(n) add the terms t(k) = ak + b from k = 1 through n. Is S(n) always equal to Q(n) = (An² + Bn + C)/D on the stated integer domain?

Use whole numbers −20 through 20 for a, b, A, B and C. D must be 1 through 20. Spaces, decimal points and exponent notation are refused. The first integer is 0 or 1; the sum still starts at k = 1.

Keep learning

The twelve-question lesson covers base cases, successor algebra, missing bridges and the limits of finite checks. Save its JSON, open the RecallWeave learner, choose the file, review its preview and start the lesson.

Open the sibling RecallWeave learner when the project folder is present. Downloads are explicit; no learning session or browser storage is changed.