RETRIANGULATE(1) The Regina Handbook RETRIANGULATE(1) (NAME) retriangulate - / (SYNOPSIS) retriangulate [ -h, --height=height ] [ -t, --threads=threads ] [ -3, --dim3 | -4, --dim4 | -k, --knot ] [ -l, --all ] [ -a, --anysig ] [ -c, --classical | -V, --virtual ] [ -- ] signature retriangulate { -v, --version | -?, --help } (DESCRIPTION) - - . << >> (Pachner moves) (Reidemeister moves) . n ( - - ). n + height . ( ). << >> : o - - - - - . o - . o () . II () . II ( ) --classical --virtual . - --dim4 --knot . n ( ) . ( ) . n . ( ) --all . / . ( // / // ). : Regina Composition t t.isoSig() . /: Regina Codes / d d.sig() . - : Simplification paths in the Pachner graphs of closed orientable 3-manifold triangulations, Burton, 2011, arXiv:1110.6080. : (-) . . -- : . example$ retriangulate -h1 -- -b-LLvALwvM... (OPTIONS) -h, --height=height ( - - ) . n // n + height // . height . height . - - . - 1 - 2 . : height . height=1-- ( 2 -) . -t, --threads=threads . threads . k k . 1 ( ). -3, --dim3 () - . - - . --dim3 --dim4 --knot . -4, --dim4 - . - - - - - . -k, --knot / . II --classical --virtual . -l, --all . ( ) . -a, --anysig . Regina 7.0 (types) . . Regina . . . . --anysig Regina . ( ). : Regina . --anysig Regina . : Regina . / Regina . -c, --classical I II III . () . --knot . -V, --virtual I II III II . II II . ( ). --knot . -- . . -v, --version Regina . -?, --help . (EXAMPLES) - : example$ retriangulate -h2 hLLAAkbdceefggdonxdjxn hLLAAkbdceefggdonxdjxn hLALPkbcbefgfghxwnxark Found 2 triangulation(s). example$ retriangulate -h3 hLLAAkbdceefggdonxdjxn hLLAAkbdceefggdonxdjxn hLALPkbcbefgfghxwnxark hLLMMkbcdfefgglcghtchj gLLPQcdcefffqsjpunw Triangulation is non-minimal! Smaller triangulation: gLLPQcdcefffqsjpunw example$ : example$ retriangulate gLLPQcdcefffqsjpunw gLLPQcdcefffqsjpunw fLAMcbbcdeedhwhxn Triangulation is non-minimal! Smaller triangulation: fLAMcbbcdeedhwhxn example$ m112 : example$ censuslookup fLAMcbbcdeedhwhxn fLAMcbbcdeedhwhxn: 1 hit m112 : #2 -- Cusped hyperbolic census (orientable) example$ MACOS (MACOS USERS) Drag-and- Drop . Regina Applications /Applications/Regina.app/Contents/MacOS/retriangulate . (WINDOWS USERS) Program Files Program Files (x86) . c:\Program Files\Regina\Regina 7.4.1\bin\retriangulate.exe . (SEE ALSO) regina-gui. (AUTHORS) Benjamin Burton . Regina . 25 August 2025 RETRIANGULATE(1)