Honeycomb
A Tessellation in 
-D, for 
. The only regular honeycomb in 3-D is 
, which consists of eightcubes meeting at each Vertex. The only quasiregular honeycomb (with regular cells andsemiregular Vertex Figures) has each Vertex surrounded by eightTetrahedra and six Octahedra and is denoted 
.
There are many semiregular honeycombs, such as 
, in which eachVertex consists of two Octahedra 
and fourCuboctahedra 
.
References
Bulatov, V. ``Infinite Regular Polyhedra.'' http://www.physics.orst.edu/~bulatov/polyhedra/infinite/.
- Morrie's Law
- Morse Inequalities
- Morse Theory
- Morse-Thue Sequence
- Mortal
- Mortality Problem
- Morton-Franks-Williams Inequality
- Mosaic
- Moser
- Moser's Circle Problem
- Moss's Egg
- Motzkin Number
- Moufang Plane
- Mousetrap
- Mouth
- Moving Average
- Moving Ladder Constant
- Moving Sofa Constant
- Mrs. Perkins' Quilt
- Much Greater
- Much Less
- Mu Function
- Muirhead's Theorem
- Muller's Method
- Mulliken Symbols