Let Σ be a compact oriented surface of genus g with one boundary component. Homology cylinders over Σ form a monoid 𝓘𝒞 into which the Torelli group 𝓘 of Σ embeds by the mapping cylinder ...

The Mathematics Teacher (MT), an official journal of the National Council of Teachers of Mathematics, is devoted to improving mathematics instruction from grade 8-14 and supporting teacher education ...