Keywords: Axiom TR4 (BBD).svg LaTeX source <pre> \documentclass amsart \usepackage amsmath amssymb nopageno \usepackageall xy \begin document \begin equation \xymatrix 1em \\ \\ \\ Z' \arrrddd f \arrruuu \\ \\ \\ Y \arrruuu j \arrrd v Y' \arrrddd g \arrru \\ Z \arrru \arrrrrdd \\ \\ X \arrruuu u \arrrrruu_ v \circ u X' \arrrddd \arrrd i \\ \\ \\ \end equation \end document </pre> A depiction of axiom TR4 of a triangulated category This variant is a presentation due to Beilinson Bernstein and Deligne I created this work entirely by myself 2009-01-13 Ryan Reich <span class signature-talk >talk</span> File Octahedral diagram deligne svg w File Axiom TR4 BBD svg Commutative diagrams Homological algebra Mathematical diagrams Images with LaTeX source code |