The CM postcode area, also known as the Chelmsford postcode area, is a group of 25 postcode districts in England, which are subdivisions of 16 post towns.M postcode area map, showing postcode districts in red and post towns in grey text, with links to nearby CB, CO, E, EN, IG, RM, SG and SS postcode areas.
Patterns have an underlying mathematical structure; indeed, mathematics can be seen as the search for regularities, and the output of any function is a mathematical pattern. Similarly in the sciences, theories explain and predict regularities in the world.
1 The mathematical term for identical shapes is congruent - in mathematics, identical means they are the same tile. 2  The tiles are usually required to be homeomorphic (topologically equivalent) to a closed disk, which means bizarre shapes with holes, dangling line segments or infinite areas are excluded.