Circle Packing from Wolfram MathWorld A circle packing is an arrangement of circles inside a given boundary such that no two overlap and some or all of them are mutually tangent The generalization to spheres is called a sphere packing Tessellations of regular polygons correspond to particular circle packings Williams , pp There is a well developed theory of circle packing in the context of discrete conformal Kreise im Kreis Mathematische Basteleien Das sind Kreise, die sich berhren, in einem Umkreis liegen und ihn von innen berhren Links ist ein Beispiel Ist R der Radius des ganzen Kreises, r der Radius der gelben Kreises, x des blauen und y der grnen Kreise, so gilt hier r R , x R und y R . Tris gioco Varianti possibile estendere la griglia standard caselle caselle a griglie di dimensioni maggiori in alcuni casi, per estendere la griglia del gioco con un tocco di eleganza, si creano griglie tridimensionali, ovviamente questa variante possibile solo nei videogiochi online. MacMahons Farbwrfel Mathematische Basteleien Das Besondere an der Tabelle ist, dass sie fr alle Wrfel alle Lsungen des MacMahon Problems enthlt Will man z.Bn Farbwrfel Ab vergrert als xx Wrfel bauen, kann man die acht Wrfel leicht auswhlen Bell number In combinatorial mathematics, the Bell numbers count the possible partitions of a set.These numbers have been studied by mathematicians since the th century, and their roots go back to medieval Japan, but they are named after Eric Temple Bell, who wrote about them in the s. Starting with B B , the first few Bell numbers are , Graph theory In mathematics, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.A graph in this context is made up of vertices, nodes, or points which are connected by edges, arcs, or lines.A graph may be undirected, meaning that there is no distinction between the two vertices associated with each edge, or its edges may be directed from Rob s Puzzle Page Pattern Puzzles Pattern puzzles are a sub class of Put Together puzzles.They consist of a number of similar pieces or movable parts, each of which has some particular identifying trait or traits whose values are chosen from a small well defined set sometimes shape, but often a color or pattern, along the edges or on the face s of the piece. Pythagorean Triangles and Triples University of Surrey Pythagorean Right Angled Triangles Right angled triangles with whole number sides have fascinated mathematicians and number enthusiasts since well before BC when Pythagoras wrote about his famous theorem.

[PDF] Download ☆ Fractal Music, Hypercards & More Mathematical Recreations from Scientific American Magazine  by ¼ Martin Gardner 332 Martin Gardner

Title: [PDF] Download ☆ Fractal Music, Hypercards & More Mathematical Recreations from Scientific American Magazine  by ¼ Martin Gardner
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Published :201801002T21:08:29+00:00
This is another one of Martin Gardner's collections of columns about mathematical recreations: it's very entertaining material, and Gardner explains the mathematical concepts very well. Best of all, if you find yourself less interested in the topic of one column, you can skip to the next one without any worries (with only a couple of exceptions, the columns are entirely independent of each other)
From Dia, IIRC. Good mathy fun. I spent a lot of time with this one.