Order-infinite-3 triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-3 triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,3} |- |bgcolor=#efdcc3|Coxeter diagrams|| |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{3} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} 50px |- |bgcolor=#efdcc3|Dual||Self-dual |- |bgcolor=#efdcc3|Coxeter group||[3,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 triangular honeycomb (or 3,∞,3 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,3}.
Geometry
It has three Infinite-order triangular tiling {3,∞} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an order-3 apeirogonal tiling vertex figure.
{| class=wikitable width=640 |320px
Poincaré disk model |320px
Ideal surface |}
Related polytopes and honeycombs
It is a part of a sequence of regular honeycombs with Infinite-order triangular tiling cells: {3,∞,p}.
It is a part of a sequence of regular honeycombs with order-3 apeirogonal tiling vertex figures: {p,∞,3}.
It is a part of a sequence of self-dual regular honeycombs: {p,∞,p}.
Order-infinite-4 triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-4 triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,4}
{3,∞1,1} |- |bgcolor=#efdcc3|Coxeter diagrams||
= |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{4} |- |bgcolor=#efdcc3|Vertex figure||{∞,4} 50px
r{∞,∞} 50px |- |bgcolor=#efdcc3|Dual||{4,∞,3} |- |bgcolor=#efdcc3|Coxeter group||[3,∞,4]
[3,∞1,1] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-4 triangular honeycomb (or 3,∞,4 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,4}.
It has four infinite-order triangular tilings, {3,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order triangular tilings existing around each vertex in an order-4 apeirogonal tiling vertex figure.
{| class=wikitable width=480 |240px
Poincaré disk model |240px
Ideal surface |}
It has a second construction as a uniform honeycomb, Schläfli symbol {3,∞1,1}, Coxeter diagram, , with alternating types or colors of infinite-order triangular tiling cells. In Coxeter notation the half symmetry is [3,∞,4,1+] = [3,∞1,1].
Order-infinite-5 triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=280 !bgcolor=#efdcc3 colspan=2|Order-infinite-5 triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,5} |- |bgcolor=#efdcc3|Coxeter diagrams|| |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{5} |- |bgcolor=#efdcc3|Vertex figure||{∞,5} 40px |- |bgcolor=#efdcc3|Dual||{5,∞,3} |- |bgcolor=#efdcc3|Coxeter group||[3,∞,5] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 triangular honeycomb (or 3,∞,5 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,5}. It has five infinite-order triangular tiling, {3,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order triangular tilings existing around each vertex in an order-5 apeirogonal tiling vertex figure.
{| class=wikitable width=480 |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-6 triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-6 triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,6}
{3,(∞,3,∞)} |- |bgcolor=#efdcc3|Coxeter diagrams||
= |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{6} |- |bgcolor=#efdcc3|Vertex figure||{∞,6} 40px
{(∞,3,∞)} 40px |- |bgcolor=#efdcc3|Dual||{6,∞,3} |- |bgcolor=#efdcc3|Coxeter group||[3,∞,6] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-6 triangular honeycomb (or 3,∞,6 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,6}. It has infinitely many infinite-order triangular tiling, {3,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order triangular tilings existing around each vertex in an order-6 apeirogonal tiling, {∞,6}, vertex figure.
{| class=wikitable width=480 |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-7 triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-7 triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,7} |- |bgcolor=#efdcc3|Coxeter diagrams|| |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{7} |- |bgcolor=#efdcc3|Vertex figure||{∞,7} 40px |- |bgcolor=#efdcc3|Dual||{7,∞,3} |- |bgcolor=#efdcc3|Coxeter group||[3,∞,7] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-7 triangular honeycomb (or 3,∞,6 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,7}. It has infinitely many infinite-order triangular tiling, {3,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order triangular tilings existing around each vertex in an order-7 apeirogonal tiling, {∞,7}, vertex figure.
{| class=wikitable
|240px
Ideal surface |}
Order-infinite-infinite triangular honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-infinite triangular honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{3,∞,∞}
{3,(∞,∞,∞)} |- |bgcolor=#efdcc3|Coxeter diagrams||
= |- |bgcolor=#efdcc3|Cells||{3,∞} 40px |- |bgcolor=#efdcc3|Faces||{3} |- |bgcolor=#efdcc3|Edge figure||{∞} |- |bgcolor=#efdcc3|Vertex figure||{∞,∞} 40px
{(∞,∞,∞)} 40px |- |bgcolor=#efdcc3|Dual||{∞,∞,3} |- |bgcolor=#efdcc3|Coxeter group||[∞,∞,3]
[3,((∞,∞,∞))] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-infinite triangular honeycomb (or 3,∞,∞ honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,∞,∞}. It has infinitely many infinite-order triangular tiling, {3,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order triangular tilings existing around each vertex in an infinite-order apeirogonal tiling, {∞,∞}, vertex figure.
{| class=wikitable width=480 |240px
Poincaré disk model |240px
Ideal surface |}
It has a second construction as a uniform honeycomb, Schläfli symbol {3,(∞,∞,∞)}, Coxeter diagram, = , with alternating types or colors of infinite-order triangular tiling cells. In Coxeter notation the half symmetry is [3,∞,∞,1+] = [3,((∞,∞,∞))].
Order-infinite-3 square honeycomb
{| class="wikitable" align="right" style="margin-left:10px" !bgcolor=#efdcc3 colspan=2|Order-infinite-3 square honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{4,∞,3} |- |bgcolor=#efdcc3|Coxeter diagram|| |- |bgcolor=#efdcc3|Cells||{4,∞} 80px |- |bgcolor=#efdcc3|Faces||{4} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} |- |bgcolor=#efdcc3|Dual||{3,∞,4} |- |bgcolor=#efdcc3|Coxeter group||[4,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 square honeycomb (or 4,∞,3 honeycomb) a regular space-filling tessellation (or honeycomb). Each infinite cell consists of a heptagonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.
The Schläfli symbol of the order-infinite-3 square honeycomb is {4,∞,3}, with three infinite-order square tilings meeting at each edge. The vertex figure of this honeycomb is an order-3 apeirogonal tiling, {∞,3}.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-3 pentagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" !bgcolor=#efdcc3 colspan=2|Order-infinite-3 pentagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{5,∞,3} |- |bgcolor=#efdcc3|Coxeter diagram|| |- |bgcolor=#efdcc3|Cells||{5,∞} 80px |- |bgcolor=#efdcc3|Faces||{5} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} |- |bgcolor=#efdcc3|Dual||{3,∞,5} |- |bgcolor=#efdcc3|Coxeter group||[5,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 pentagonal honeycomb (or 5,∞,3 honeycomb) a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an infinite-order pentagonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.
The Schläfli symbol of the order-6-3 pentagonal honeycomb is {5,∞,3}, with three infinite-order pentagonal tilings meeting at each edge. The vertex figure of this honeycomb is a heptagonal tiling, {∞,3}.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-3 hexagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" !bgcolor=#efdcc3 colspan=2|Order-infinite-3 hexagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{6,∞,3} |- |bgcolor=#efdcc3|Coxeter diagram|| |- |bgcolor=#efdcc3|Cells||{6,∞} 80px |- |bgcolor=#efdcc3|Faces||{6} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} |- |bgcolor=#efdcc3|Dual||{3,∞,6} |- |bgcolor=#efdcc3|Coxeter group||[6,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 hexagonal honeycomb (or 6,∞,3 honeycomb) a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an order-3 apeirogonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.
The Schläfli symbol of the order-infinite-3 hexagonal honeycomb is {6,∞,3}, with three infinite-order hexagonal tilings meeting at each edge. The vertex figure of this honeycomb is an order-3 apeirogonal tiling, {∞,3}.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-3 heptagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" !bgcolor=#efdcc3 colspan=2|Order-infinite-3 heptagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{7,∞,3} |- |bgcolor=#efdcc3|Coxeter diagram|| |- |bgcolor=#efdcc3|Cells||{7,∞} 80px |- |bgcolor=#efdcc3|Faces||{7} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} |- |bgcolor=#efdcc3|Dual||{3,∞,7} |- |bgcolor=#efdcc3|Coxeter group||[7,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 heptagonal honeycomb (or 7,∞,3 honeycomb) a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an infinite-order heptagonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.
The Schläfli symbol of the order-infinite-3 heptagonal honeycomb is {7,∞,3}, with three infinite-order heptagonal tilings meeting at each edge. The vertex figure of this honeycomb is an order-3 apeirogonal tiling, {∞,3}.
{| class=wikitable
|240px
Ideal surface |}
Order-infinite-3 apeirogonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" !bgcolor=#efdcc3 colspan=2|Order-infinite-3 apeirogonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{∞,∞,3} |- |bgcolor=#efdcc3|Coxeter diagram|| |- |bgcolor=#efdcc3|Cells||{∞,∞} 80px |- |bgcolor=#efdcc3|Faces||Apeirogon {∞} |- |bgcolor=#efdcc3|Vertex figure||{∞,3} |- |bgcolor=#efdcc3|Dual||{3,∞,∞} |- |bgcolor=#efdcc3|Coxeter group||[∞,∞,3] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-3 apeirogonal honeycomb (or ∞,∞,3 honeycomb) a regular space-filling tessellation (or honeycomb). Each infinite cell consists of an infinite-order apeirogonal tiling whose vertices lie on a 2-hypercycle, each of which has a limiting circle on the ideal sphere.
The Schläfli symbol of the apeirogonal tiling honeycomb is {∞,∞,3}, with three infinite-order apeirogonal tilings meeting at each edge. The vertex figure of this honeycomb is an infinite-order apeirogonal tiling, {∞,3}.
The "ideal surface" projection below is a plane-at-infinity, in the Poincaré half-space model of H3. It shows an Apollonian gasket pattern of circles inside a largest circle.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-4 square honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-4 square honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{4,∞,4} |- |bgcolor=#efdcc3|Coxeter diagrams||
= |- |bgcolor=#efdcc3|Cells||{4,∞} 60px |- |bgcolor=#efdcc3|Faces||{4} |- |bgcolor=#efdcc3|Edge figure||{4} |- |bgcolor=#efdcc3|Vertex figure||{∞,4}
{∞,∞} |- |bgcolor=#efdcc3|Dual||self-dual |- |bgcolor=#efdcc3|Coxeter group||[4,∞,4] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-4 square honeycomb (or 4,∞,4 honeycomb) a regular space-filling tessellation (or honeycomb) with Schläfli symbol {4,∞,4}.
All vertices are ultra-ideal (existing beyond the ideal boundary) with four infinite-order square tilings existing around each edge and with an order-4 apeirogonal tiling vertex figure.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
It has a second construction as a uniform honeycomb, Schläfli symbol {4,∞1,1}, Coxeter diagram, , with alternating types or colors of cells. In Coxeter notation the half symmetry is [4,∞,4,1+] = [4,∞1,1].
Order-infinite-5 pentagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-5 pentagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbol||{5,∞,5} |- |bgcolor=#efdcc3|Coxeter diagrams|| |- |bgcolor=#efdcc3|Cells||{5,∞} 60px |- |bgcolor=#efdcc3|Faces||{5} |- |bgcolor=#efdcc3|Edge figure||{5} |- |bgcolor=#efdcc3|Vertex figure||{∞,5} |- |bgcolor=#efdcc3|Dual||self-dual |- |bgcolor=#efdcc3|Coxeter group||[5,∞,5] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-5 pentagonal honeycomb (or 5,∞,5 honeycomb) a regular space-filling tessellation (or honeycomb) with Schläfli symbol {5,∞,5}.
All vertices are ultra-ideal (existing beyond the ideal boundary) with five infinite-order pentagonal tilings existing around each edge and with an order-5 apeirogonal tiling vertex figure.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
Order-infinite-6 hexagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=280 !bgcolor=#efdcc3 colspan=2|Order-infinite-6 hexagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{6,∞,6}
{6,(∞,3,∞)} |- |bgcolor=#efdcc3|Coxeter diagrams||
= |- |bgcolor=#efdcc3|Cells||{6,∞} 60px |- |bgcolor=#efdcc3|Faces||{6} |- |bgcolor=#efdcc3|Edge figure||{6} |- |bgcolor=#efdcc3|Vertex figure||{∞,6} 40px
{(5,3,5)} 40px |- |bgcolor=#efdcc3|Dual||self-dual |- |bgcolor=#efdcc3|Coxeter group||[6,∞,6]
[6,((∞,3,∞))] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-6 hexagonal honeycomb (or 6,∞,6 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {6,∞,6}. It has six infinite-order hexagonal tilings, {6,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many hexagonal tilings existing around each vertex in an order-6 apeirogonal tiling vertex figure.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
It has a second construction as a uniform honeycomb, Schläfli symbol {6,(∞,3,∞)}, Coxeter diagram, , with alternating types or colors of cells. In Coxeter notation the half symmetry is [6,∞,6,1+] = [6,((∞,3,∞))].
Order-infinite-7 heptagonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=280 !bgcolor=#efdcc3 colspan=2|Order-infinite-7 heptagonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{7,∞,7} |- |bgcolor=#efdcc3|Coxeter diagrams|| |- |bgcolor=#efdcc3|Cells||{7,∞} 60px |- |bgcolor=#efdcc3|Faces||{7} |- |bgcolor=#efdcc3|Edge figure||{7} |- |bgcolor=#efdcc3|Vertex figure||{∞,7} 40px |- |bgcolor=#efdcc3|Dual||self-dual |- |bgcolor=#efdcc3|Coxeter group||[7,∞,7] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-7 heptagonal honeycomb (or 7,∞,7 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {7,∞,7}. It has seven infinite-order heptagonal tilings, {7,∞}, around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many heptagonal tilings existing around each vertex in an order-7 apeirogonal tiling vertex figure.
{| class=wikitable
|240px
Ideal surface |}
Order-infinite-infinite apeirogonal honeycomb
{| class="wikitable" align="right" style="margin-left:10px" width=240 !bgcolor=#efdcc3 colspan=2|Order-infinite-infinite apeirogonal honeycomb |- |bgcolor=#efdcc3|Type||Regular honeycomb |- |bgcolor=#efdcc3|Schläfli symbols||{∞,∞,∞}
{∞,(∞,∞,∞)} |- |bgcolor=#efdcc3|Coxeter diagrams||
↔ |- |bgcolor=#efdcc3|Cells||{∞,∞} 60px |- |bgcolor=#efdcc3|Faces||{∞} |- |bgcolor=#efdcc3|Edge figure||{∞} |- |bgcolor=#efdcc3|Vertex figure||40px {∞,∞}
40px {(∞,∞,∞)} |- |bgcolor=#efdcc3|Dual||self-dual |- |bgcolor=#efdcc3|Coxeter group||[∞,∞,∞]
[∞,((∞,∞,∞))] |- |bgcolor=#efdcc3|Properties||Regular |} In the geometry of hyperbolic 3-space, the order-infinite-infinite apeirogonal honeycomb (or ∞,∞,∞ honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {∞,∞,∞}. It has infinitely many infinite-order apeirogonal tiling {∞,∞} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many infinite-order apeirogonal tilings existing around each vertex in an infinite-order apeirogonal tiling vertex figure.
{| class=wikitable |240px
Poincaré disk model |240px
Ideal surface |}
It has a second construction as a uniform honeycomb, Schläfli symbol {∞,(∞,∞,∞)}, Coxeter diagram, , with alternating types or colors of cells.
See also
References
External links