- Bijection - wikipedia
In mathematics, a bijection, or a bijective function is a function f from a set X to a set Y with the property that, for every y in Y, there is exactly one x in X such that f(x) = y. Alternatively, f is bijective if it is a one-to-one correspondence between those sets; i.e., both one-to-one (injective) and onto (surjective).[1] (See also Bijection, injection and surjection.)
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in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups - Bijection, injection and surjection - Wikipedia
In mathematics, injections, surjections and bijections are classes of functions distinguished by the manner in which arguments (input expressions from the domain) and images (output expressions from the codomain) are related or mapped to each other.
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in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups
Note: Need to learn this. - Catalogue Central
At Catalogue Central we are committed to providing our visitors with the best FREE online retail shopping information experience. Our aim is to provide visitors with the most up-to-date retail catalogue buying reference guide through freshly published online catalogues. With Catalogue Central there is no need to ever miss a catalogue sale. And, by becoming a member your current preferred catalogues will always be waiting for you whenever you login to the site. Our catalogues are published in page flipping style DNL form or in the more familiar PDF format.
Huge Range of Online Catalogues For FREE from Australia's Biggest Brands. View the latest Sale Catalogues online with Catalogue Central!
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in Lifestyle > Consumer Related - Fixed point property - Wikipedia
In mathematics, a topological space X has the fixed point property if all continuous mappings from X to X have a fixed point.
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in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups
Note: In mathematics, a fixed point (sometimes shortened to fixpoint) of a function is a point that is mapped to itself by the function... http://en.wikipedia.org/wiki/Fixed_point_%28mathematics%29 - Fixed-point theorem - Wikipedia
In mathematics, a fixed-point theorem is a result saying that a function F will have at least one fixed point (a point x for which F(x) = x), under some conditions on F that can be stated in general terms. Results of this kind are amongst the most generally useful in mathematics. The Banach fixed point theorem gives a general criterion guaranteeing that, if it is satisfied, the procedure of iterating a function yields a fixed point. By contrast, the Brouwer fixed point theorem is a non-constructive result: it says that any continuous function from the closed unit ball in n-dimensional Euclidean space to itself must have a fixed point, but it doesn't describe how to find the fixed point (See also Sperner's lemma).
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in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups - How to Help Yourself - Ubuntu Forums
I thought it might be nice if we all contribute some tips on common ways to solve problems. If there is a similar thread please let me know and perhaps we can merge them or at least reference it. Also, I will make another post in this thread containing a list of all the commands, configuration files, and all of the URLs. Finally, I strongly encourage others to contribute their ideas and I will add more ideas if they occur to me. Perhaps if there is enough demand, we can make a wiki (again if doesn't exist already)
How to Help Yourself Absolute Beginner Talk
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in Computing > Linux > Howto
Note: A useful set of reference links for guides and help. - Leave No Trace Australia
Leave No Trace Australia is a national non-profit organisation dedicated to promoting and inspiring responsible outdoor travel and recreation through education, research and partnerships. Leave No Trace builds awareness, appreciation and respect for our natural and cultural heritage. We are dedicated to promoting attitudinal change and the empowerment of individuals, companies and communities to accept responsibility for the conservation of their natural environment. This is achieved by forming partnerships to foster the development of Leave No Trace minimal impact skills and ethics.
Leave No Trace Australia promotes and inspires responsible travel and recreation through education, research and partnerships. Leave No Trace is Australia's national minimal impact program
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in Political > Enviromental - Passionfoods - Eco-Living Store - South Melbourne
At Passionfoods we stock only the finest quality, naturally raised, organic and biodynamic fresh produce, chemical-free gourmet foods and earthsmart products. Sourced locally, regionally and globally, our line-up of more than 7,000 eco-aware items come direct to you from food artisans and provedores, family-run local farms and certified green companies, dedicated to creating ecologically sound and sustainable products that are clever, better, and pure pleasure to experience.
in Lifestyle > Food and Beverage - PBwiki.com | Free Collaborative Editing & Publishing
75.000 hosted wikis (free accounts, supports tables)
Online Team Collaboration: shared workspaces for working with colleagues, clients, and partners.
in Computing > World Wide Web > Collaboration Tools by 39 users - Qunu | live help when you need it most
Qunu is a search engine for people. We use instant messaging to connect -- in real time -- people who have (for now) software or tech-related questions with experts who are passionate and willing to help.
Qunu is live help when you need it most. Qunu connects - in realtime - people who require immediate software or tech-related help with experts who are online and available to help.
in Computing > World Wide Web > Collaboration Tools by 6 users - Range (mathematics) - Wikipedia
In mathematics, the range of a function is the set of all "output" values produced by that function. Sometimes it is called the image, or more precisely, the image of the domain of the function....The range should not be confused with the codomain B. The range is a subset of the codomain, but is not necessarily equal to the codomain, since there may be elements of the codomain which are not elements of the range. The codomain is sometimes taken to be the range, but more often is some standard set, such as the real numbers or the complex numbers, which contains the range. A function whose range equals its codomain is called onto or surjective.
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in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups - Sustainable Living Foundation (SLF)
The Sustainable Living Foundation (SLF) is a community based not-for-profit organisation committed to promoting, celebrating and practicing principles of sustainable living. SLF brings together values, expertise and resources to inform and inspire the wider community about sustainable living.
in Political > Enviromental - The Boston Consulting Group/OSTG Hacker Survey
Who are the hackers that create all this great free software? How much time do they spend? Why do they do it? Where are they from? Do they think its sustainable? In order to better understand the nature of this dynamic community and provide lessons to the business world about innovation, Surveyed hackers participating on software projects on SourceForge.net, the world's largest collaborative software development Web site for the Open Source community and the Linux kernel mailing list.
A media, services and e-commerce network that provides and promotes Open Source software downloads, development, discussion and news.
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in Computing > Software
Note: • Participants note extremely high levels of creativity in their projects. • Defeating proprietary software companies is not a major motivator. • Truly global in composition with respondents coming from 35 countries. • Most participants dedicated at least 10 hours per week in their shared programmin ...moreg efforts • Contrary to popular belief about hackers, the open source community is mostly comprised of highly skilled IT professionals who have on average over 10 years of programming experience - The Web Standards Project
The Web Standards Project is a grassroots coalition fighting for standards which ensure simple, affordable access to web technologies for all.
The Web Standards Project is a grassroots coalition fighting for standards which ensure simple, affordable access to web technologies for all.
in Computing > World Wide Web by 22 users - Wiki Wiki Web
The first WikiWikiWeb (http://c2.com/cgi/wiki), is named after the "Wiki Wiki" line of "Chance RT-52 shuttle buses" in Honolulu International Airport, Hawaii by Ward Cunningham. Cunningham named WikiWikiWeb that way because he remembered a Honolulu International Airport counter employee telling him to take the so-called "Wiki Wiki" Chance RT-52 shuttle bus line that runs between the airport's terminals. According to Cunningham, "I chose wiki-wiki as an alliterative substitute for 'quick' and thereby avoided naming this stuff quick-web." "Wiki Wiki" is a reduplication of "wiki", a Hawaiian-language word for fast. The word wiki is a shorter form of wiki wiki (weekie, weekie).
in Computing > World Wide Web > Collaboration Tools by 2 users
Note: Good list of wiki hosting on the web at: WikiWikiClones (http://www.c2.com/cgi/wiki?WikiWikiClones) - Green Pages Australia
Great Idea, crap implementation. "Green Pages is the first national directory of environmentally sustainable products and services."
Australia is host to a vast variety of plant life. It is estimated that over 34,000 species of plants and 253,000 species of fungi and lichens make Australia their home.
in Political > Enviromental by 2 users
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