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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".

Project: Xena
Views: 18536
License: APACHE

Copy-paste into a comment when reviewing a pull request:

Check: * [ ] coding style * [ ] documentation: see [the documentation requirements](doc.md) * [ ] for tactics: * [ ] tests * [ ] efficiency (make sure at least it's not outrageously inefficient) * [ ] it fits the overall mathlib design