This article relies excessively on references to primary sources .(July 2017) |

Type of business | Private |
---|---|

Type of site | Internet encyclopedia project |

Available in | English |

Owner | Wolfram Research, Inc. |

Created by | Eric W. Weisstein ^{ [1] } |

URL | mathworld |

Launched | November 1999 |

Current status | Active |

* MathWorld* is an online mathematics reference work, created and largely written by Eric W. Weisstein.

Eric W. Weisstein, the creator of the site, was a physics and astronomy student who got into the habit of writing notes on his mathematical readings. In 1995 he put his notes online and called it "Eric's Treasure Trove of Mathematics." It contained hundreds of pages/articles, covering a wide range of mathematical topics. The site became popular as an extensive single resource on mathematics on the web. In 1998, he made a contract with CRC Press and the contents of the site were published in print and CD-ROM form, titled "CRC Concise Encyclopedia of Mathematics." The free online version became only partially accessible to the public. In 1999 Weisstein went to work for Wolfram Research, Inc. (WRI), and WRI renamed the Math Treasure Trove to *MathWorld* and hosted it on the company's website^{[ citation needed ]} without access restrictions.^{[ citation needed ]}

In 2022, Mathworld WVR was released on the Oculus, *"Each mini game in Math World VR combines simple math that adds a fun challenge"*.^{ [4] } In 2023, Mathworld VR added new mini games. The games combine math arithmetic that makes math, fun.^{ [5] }^{ [6] } The game can be played on the Oculus Quest, Quest 2, and the Meta Quest Pro virtual reality headsets.^{ [4] }

In 2000, CRC Press sued Wolfram Research Inc. (WRI), WRI president Stephen Wolfram, and author Eric W. Weisstein, due to what they considered a breach of contract: that the *MathWorld* content was to remain in print only. The site was taken down by a court injunction.^{ [7] }

The case was later settled out of court, with WRI paying an unspecified amount and complying with other stipulations. Among these stipulations is the inclusion of a copyright notice at the bottom of the website and broad rights for the CRC Press to produce *MathWorld* in printed book form. The site then became once again available free to the public.^{[ citation needed ]}

This case made a wave of headlines in online publishing circles. The * PlanetMath * project was a result of MathWorld's being unavailable.^{ [8] }

In mathematics, and especially in category theory, a **commutative diagram** is a diagram such that all directed paths in the diagram with the same start and endpoints lead to the same result. It is said that commutative diagrams play the role in category theory that equations play in algebra.

In mathematics and logic, an **axiomatic system** is any set of axioms from which some or all axioms can be used in conjunction to logically derive theorems. A theory is a consistent, relatively-self-contained body of knowledge which usually contains an axiomatic system and all its derived theorems. An axiomatic system that is completely described is a special kind of formal system. A formal theory is an axiomatic system that describes a set of sentences that is closed under logical implication. A formal proof is a complete rendition of a mathematical proof within a formal system.

**Wolfram Research, Inc.** is an American multinational company that creates computational technology. Wolfram's flagship product is the technical computing program Wolfram Mathematica, first released on June 23, 1988. Other products include WolframAlpha, Wolfram SystemModeler, Wolfram Workbench, gridMathematica, Wolfram Finance Platform, webMathematica, the Wolfram Cloud, and the Wolfram Programming Lab. Wolfram Research founder Stephen Wolfram is the CEO. The company is headquartered in Champaign, Illinois, United States.

**Eric Wolfgang Weisstein** is an American mathematician and encyclopedist who created and maintains the encyclopedias *MathWorld* and *ScienceWorld*. In addition, he is the author of the *CRC Concise Encyclopedia of Mathematics*. He works for Wolfram Research.

In geometry, **Napoleon's theorem** states that if equilateral triangles are constructed on the sides of any triangle, either all outward or all inward, the lines connecting the centres of those equilateral triangles themselves form an equilateral triangle.

In mathematics, the **boustrophedon transform** is a procedure which maps one sequence to another. The transformed sequence is computed by an "addition" operation, implemented as if filling a triangular array in a boustrophedon manner—as opposed to a "Raster Scan" sawtooth-like manner.

In mathematics, an **operation** is a function which takes zero or more input values to a well-defined output value. The number of operands is the arity of the operation.

In geometry, a tessellation of dimension 2 or higher, or a polytope of dimension 3 or higher, is **isohedral** or **face-transitive** if all its faces are the same. More specifically, all faces must be not merely congruent but must be *transitive*, i.e. must lie within the same *symmetry orbit*. In other words, for any two faces A and B, there must be a symmetry of the *entire* figure by translations, rotations, and/or reflections that maps A onto B. For this reason, convex isohedral polyhedra are the shapes that will make fair dice.

**Calculus** is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of contemporary mathematics education. Calculus has widespread applications in science, economics, and engineering and can solve many problems for which algebra alone is insufficient.

In geometry, an **edge** is a particular type of line segment joining two vertices in a polygon, polyhedron, or higher-dimensional polytope. In a polygon, an edge is a line segment on the boundary, and is often called a **polygon side**. In a polyhedron or more generally a polytope, an edge is a line segment where two faces meet. A segment joining two vertices while passing through the interior or exterior is not an edge but instead is called a diagonal.

**Heiko Harborth** is Professor of Mathematics at Braunschweig University of Technology, 1975–present, and author of more than 188 mathematical publications. His work is mostly in the areas of number theory, combinatorics and discrete geometry, including graph theory.

In mathematics, the word **constant** conveys multiple meanings. As an adjective, it refers to non-variance ; as a noun, it has two different meanings:

* CRC Concise Encyclopedia of Mathematics* is a bestselling book by American author Eric W. Weisstein.

In differential geometry, **Catalan's minimal surface** is a minimal surface originally studied by Eugène Charles Catalan in 1855.

**Reality Labs** is a business and research unit of Meta Platforms that produces virtual reality (VR) and augmented reality (AR) hardware and software, including virtual reality headsets such as Quest, and online platforms such as Horizon Worlds. In June 2022, several artificial intelligence (AI) initiatives that were previously a part of Meta AI were transitioned to Reality Labs. This also includes Meta's fundamental AI Research laboratory *FAIR* which is now part of the *Reality Labs - Research (RLR)* division.

**Seiffert's spherical spiral** is a curve on a sphere made by moving on the sphere with constant speed and angular velocity with respect to a fixed diameter. If the selected diameter is the line from the north pole to the south pole, then the requirement of constant angular velocity means that the longitude of the moving point changes at a constant rate. The cylindrical coordinates of the varying point on this curve are given by the Jacobian elliptic functions.

The **M _{22} graph**, also called the

The **Quest 2** is a virtual reality (VR) headset developed by Reality Labs, a division of Facebook, Inc.. It was unveiled on September 16, 2020, and released on October 13 as the **Oculus Quest 2**. It was then rebranded as the **Meta Quest 2** in 2022, as part of a company-wide phase-out of the Oculus brand after the rebranding of Facebook, Inc. as Meta.

- ↑ Eric Weisstein (2007). "Making MathWorld".
*Mathematica Journal*.**10**(3). Archived from the original on 2012-07-09. Retrieved 2010-08-22. - ↑ "Wolfram MathWorld : the web's most extensive mathematics resource | WorldCat.org".
*www.worldcat.org*. Retrieved 2023-03-28. - 1 2 "Making MathWorld « The Mathematica Journal" . Retrieved 2023-03-28.
- 1 2 "Mathworld VR". 3 May 2022. Retrieved 11 April 2023.
- ↑ "Math World VR Update Adds 4 New Mini Games, Unlockables, & UI Update".
*Morningstar, Inc*. 2023-04-11. Retrieved 2023-04-12. - ↑ Prepare, Skill. "Math World VR Update Adds 4 New Mini Games, Unlockables, & UI Update".
*Baker City Herald*. Retrieved 2023-04-12. - ↑ "CRC Press, LLC v. Wolfram Research, Inc., 149 F. Supp. 2d 500 | Casetext Search + Citator".
*casetext.com*. Retrieved 2023-03-28. - ↑ Corneli, Joseph (2011). "The PlanetMath Encyclopedia" (PDF).
*ITP 2011 Workshop on Mathematical Wikis (MathWikis 2011) Nijmegen, Netherlands, August 27, 2011*.

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