Try doing some basic maths questions in the Lean Theorem Prover. Functions, real numbers, equivalence relations and groups. Click on README.md and then on "Open in CoCalc with one click".
License: APACHE
import .import1 .import2 /- this file tests that declararing the same or similar notation in two different files will rarely cause errors. We will get an error if we add the same command to the same namespace in the same environment in two different files, and then import them both. (e.g. if we remove `nat` in file `import2`. -/