The authors investigated how secondary mathematics teachers check student geometry proofs. From video records of geometry teachers checking proofs, they conjectured that teachers have different ...

An artificial-intelligence (AI) tool can rigorously prove whether geometric facts — statements about two-dimensional shapes such as triangles or polygons — are true, just as well as competitors in the ...

A few weeks ago, an animated discussion unfolded in a WhatsApp group whose members are mathematicians interested in the Indian Mathematical Olympiad. The spark was a Nature paper that announced a ...

Preface / by Stewart Blay -- Introduction -- Proof coins -- Proof coins defined / by Rogert Burdette -- Process in creating matte proofs -- Distribution and history of Lincoln cent matte proofs -- ...