Jul 14th, 2010
by admin.
167 views
WEARMATH.COM is proud to release another awesome math t-shirt design. Heawood famously discovered that every map on a torus can be coloured with seven colours, and this is best possible, since the pictured map (Heawood’s Map) depicts a tiling of the torus with seven hexagons, every pair of which shares an edge.
Heawood's Map Design One Math T-Shirt from WEARMATH.COM
Note that over the coming months we will be changing how the WEARMATH.COM math t-shirt store is organized. Rather than being organized by type of mathematics apparel, the math t-shirt store will be organized by design. This will allow us to provide you with a wider range of products to help you share wonderful mathematical ideas and images.
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Posted in: Uncategorized, apparel, t-shirt.
Tagged: coloring · design · geometry · heawood · hexagon · map · math t-shirt · mathematics · tiling · topology · torus
Nov 8th, 2009
by admin.
708 views
WEARMATH.COM is pleased to announce our latest design based on the 5-edge coloring of the Petersen graph.
Petersen Graph 5-edge Coloring Math T-shirt from WEARMATH.COM (as a Ringet Tee)
In an earlier design, we used a 3-vertex coloring of the Petersen graph as the basis for the design. This property is not that remarkable though. However, it’s a fact that for the Petersen graph 
— that is, the automorphism group of the Petersen graph is isomorphic to the symmetric group on five letters and acts on the 5 edge color classes.
The Petersen graph 5-edge coloring math t-shirt design is available as a t-shirt, sweatshirt, long sleeve t-shirt, hoodie, ringer t-shirts, sleeveless t-shirt, and women’s t-shirt in a variety of colors.
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Posted in: apparel, graph theory, graph theory designs, t-shirt.
Tagged: automorphism group · edge coloring · graph theory · graph theory t-shirt · math hoodie · math t-shirt · Petersen graph · symmetric group · t-shirt
Sep 25th, 2009
by admin.
892 views
The Petersen graph is an undirected graph of with 10 vertices and 15 edges. In graph theory, it provides many counterexamples. The Petersen graph has many interesting properties:1
- It’s nonplanar
- It has chromatic number 3
- It has crossing number 2
- It has orientable genus 1
- It has non-orientable genus 1
- It is a unit distance graph
- It is strongly regular
- It is symmetric
- It is one of only 13 cubic distance-regular graphs
- It has a Hamiltonian path but no Hamiltonian cycle
- It is the smallest vertex-transitive graph that is not a Cayley graph
- It has chromatic index 4
The list goes on….
You can now proudly wear a 3-coloring of the famous Petersen graph with the latest design from WEARMATH.COM.
Petersen graph 3-coloring design from WEARMATH.COM
You can purchase your Petersen Graph 3-Coloring t-shirt from the WEARMATH.COM store today! Available in multiple sizes and colors as a t-shirt, crewneck sweater, long sleeve t-shirt, hooded sweatshirt, women’s t-shirt, ringer t-shirt and as a sleeveless t-shirt for your vigorous theorem proving sessions at the mathematics institute 
References
- Petersen Graph http://en.wikipedia.org/wiki/Petersen_graph Accessed 25/09/09.
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Posted in: apparel, graph theory, graph theory designs, t-shirt.
Tagged: chromatic index · chromatic number · crossing number · cubic distance-regular graph · graph theory · Hamiltonian path · non-orietable genus · nonplanar · orientable genus · Petersen graph · strongly regular · symmetric · t-shirt · unit distance graph · vertex-transitive graph
Aug 28th, 2009
by admin.
883 views
WEARMATH.COM is proud to announce the release of the Szekeres Snark design:
Szekeres Snark Graph Theory T-Shirt from WEARMATH.COM
A Snark is a connected, bridgeless cubic graph with chromatic index equal to 4. The Szekeres Snark is the fifth known snark with 50 vertices and 75 edges. It was discovered by George Szekeres in 1973.1
This design is available as a t-shirt, sweatshirt, long sleeve t-shirts, hooded sweatshirt, ringer t-shirt, sleeveless t-shirt, and women’s t-shirt in various colors from the WEARMATH.COM Math T-Shirt Store.
References:
- Szekeres, G. (1973). “Polyhedral decompositions of cubic graphs”. Bull. Austral. Math. Soc. 8: 367–387.
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Posted in: apparel, graph theory designs, t-shirt.
Tagged: bridgeless graph · chromatic index · connected graph · cubic graph · George Szekeres · graph · snark · t-shirt
Aug 10th, 2009
by admin.
1,173 views
WEARMATH.COM is proud to release a design based on the Fano Plane, the ‘smallest’ finite projective plane with 7 lines and 7 points.
Fano Finite Projective Plane t-shirt design from WEARMATH.COM
This math t-shirt design is available in both light and dark colors as a t-shirt, sweatshirt, long sleeve t-shirt, hooded sweatshirt, ringer t-shirt (pictured above), sleeveless t-shirt, and a women’s t-shirt from the WEARMATH.COM math t-shirt store.
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Posted in: apparel, t-shirt.
Tagged: finite geometry · finite projective geometry · finte projective planes · geometric · Gino Fano · incidence geometry · t-shirt
