Search results
Results From The WOW.Com Content Network
An astroid as the envelope of the family of lines connecting points (s,0), (0,t) with s 2 + t 2 = 1. The following example shows that in some cases the envelope of a family of curves may be seen as the topologic boundary of a union of sets, whose boundaries are the curves of the envelope.
The word ambigram was coined in 1983 by Douglas Hofstadter, an American scholar of cognitive science best known as the Pulitzer Prize-winning author of the book Gödel, Escher, Bach. [ 7 ] [ 4 ] [ 5 ] It is a neologism composed of the Latin prefix ambi- ("both") and the Greek suffix -gram ("drawing, writing").
For the person interested in tilings and patterns, Visions of Symmetry provides many beautiful examples (which illustrate the theory expounded in Grünbaum and Shepard's Tilings and patterns [1987])." [8] J. Kevin Colligan reviewing the book for The Mathematics Teacher wrote: "This book sits on the boundary between mathematics and art, as did ...
Symmetry occurs not only in geometry, but also in other branches of mathematics. Symmetry is a type of invariance: the property that a mathematical object remains unchanged under a set of operations or transformations. [1] Given a structured object X of any sort, a symmetry is a mapping of the object
The publication of the book was sponsored by the IUCr and the original target audience was crystallography students learning the principles of symmetry, particularly color symmetry. In the introduction to the book the author states "Although the book is meant primarily for undergraduate students, I hope that many people who are simply amused ...
In mathematics, reflection symmetry, line symmetry, mirror symmetry, or mirror-image symmetry is symmetry with respect to a reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry. In 2-dimensional space, there is a line/axis of symmetry, in 3-dimensional space, there is a plane of symmetry
Customers will be given free sanitary products with ‘no questions asked’ if they tell staff they need a white envelope at any supermarket Tesco praised for two-word ‘white envelope’ code ...
The category of all R-supermodules forms a monoidal category under the super tensor product with R serving as the unit object. An associative, unital superalgebra over R can then be defined as a monoid in the category of R-supermodules. That is, a superalgebra is an R-supermodule A with two (even) morphisms