Category Theory

China alert over bird flu death

Chinese authorities shut down and clean poultry markets in Hebei province, after the first human death in nearly a year.

news.bbc.co.uk

'Wolfman' returns

Explorer Jim McNeill tracks down Arctic wolves

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Poetry or science?

Is romantic love just a chemical cocktail?

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Mummy of female pharaoh uncovered

Egyptologists find remains of a mummy thought to belong to a queen who ruled 4,300 years ago, Egypt's antiquities chief announced.

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Body repair 'could be ramped up'

A combination of drugs could trick the body into sending its repair mechanisms into overdrive, say scientists.

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Animal matters

Scotland's debate over tests on primates

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Black holes 'preceded galaxies'

Astronomers believe they have solved a cosmic chicken-and-egg question: what came first - black holes or galaxies?

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Our writers talk back

Some of the previous contributors to the Green Room respond to readers' questions and comments.

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Holes give edge to new armour

Scientists from the UK Ministry of Defence (MoD) have devised ultra-hard vehicle armour to protect military personnel.

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Panda bites his third tourist in two years at Beijing zoo

A panda at Beijing zoo bites a man for the third time in two years.

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US vows 'huge' marine protection

The US is to establish "the largest area of protected sea in the world", banning fishing and mining, around its Pacific islands.

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Heat may spark world food crisis

Half the world's population could face food crisis by 2100 as soaring temperatures cripple staple crops, scientists warn.

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A deep-sea fish caught in the Pacific has mirrors for eyes

A deep-sea fish caught in the Pacific has eyes which use mirrors as well as lenses, scientists discover.

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Tech fair offers greener vision

Analysts at the Consumer Electronics Show say green credentials of tech products will become critical to success.

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Earth Watch

Why it is hard to predict sudden environmental crises

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Mosquitoes make sweet love music

Sexy songs sung by mosquitoes in courtship could be key to curbing the spread of dengue fever, say scientists.

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Baby Jupiter's huge weight gain

The planet Jupiter must have gained mass fast during its infancy, according to astronomers.

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Everest trip helps critically ill

Blood oxygen levels recorded on a trip by medics to Everest could help the treatment of critically ill patients.

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Beagle hunter

On a mission to find the most famous ship of science

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Feilden's blog

Ground-breaking new technique in stem cell science

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First flight of algae-fuelled jet

Continental Airlines is the latest to test fly a jet biofuel, this time with a product derived partially from algae.

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Eat it or lose it - why centuries of crop diversity are at risk

Centuries of crop diversity are at risk of being lost forever as farmers turn to just a few modern, high yielding varieties.

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Venomous mammal caught on camera

Rare footage of one of the world's most strange and elusive mammals is captured by scientists.

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Canadians claim South Pole record

A trio of Canadians claim a new record for the fastest trek across Antarctica to the South Pole.

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Zimbabwe troops 'eat elephants'

A Zimbabwean wildlife campaigner tells the BBC that soldiers are being given elephant meat to eat, as the economic crisis deepens.

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Science > Math > Algebra > Category Theory

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Category Theory

Events (10)

Journals (2)

Research Groups (13)

Category Theory:

Categorical Myths and Legends

An archive of stories about category theorists.

http://www.mcs.le.ac.uk/~ah83/cat-myths/

Categories Home Page

Web page for the category theory mailing list.

http://www.mta.ca/~cat-dist/

Categories, Quantization, and Much More

Introductory article by John Baez.

http://math.ucr.edu/home/baez/categories.html

Graand

Free Classified Ads Portal

www.graand.com

Category Theory

This expository article is an entry in the Stanford Encyclopedia of Philosophy.

http://plato.stanford.edu/entries/category-theory/

Category Theory

In the "known maths" series.

http://www.math.niu.edu/~rusin/known-math/index/18-XX.html

Computational Category Theory

An implementation of concepts and constructions from category theory in the functional programming language Standard ML. Documentation and code.

http://www.cs.man.ac.uk/~david/categories/

CT Category Theory

Section of the e-print arXiv dealing with category theory, including such topics as: enriched categories, topoi, abelian categories, monoidal categories, homological algebra.

http://front.math.ucdavis.edu/math.CT

Descent and Category Theory Connections

Maintained by M. Alsani.

http://north.ecc.edu/alsani/descent.html

A Gentle Introduction to Category Theory

Lecture notes by Maarten M. Fokkinga introducing some important notions from category theory, in particular adjunctions. Proofs are given in a calculational style, and the (few) examples are taken from algorithmics. The text is a long PostScript file.

http://wwwhome.cs.utwente.nl/~fokkinga/mmf92b.html

Groupoid Home Page

Maintained by Birant Ramazan. Address book, open problems, meetings, pictures, other resources.

http://unr.edu/homepage/ramazan/groupoid/

Groupoids

Notes by Ronald Brown.

http://www.bangor.ac.uk/~mas010/gpds.htm

Higher-Dimensional Categories

An illustrated guide book by Eugenia Cheng and Aaron Lauda (PS/PDF).

http://www.dpmms.cam.ac.uk/~elgc2/guidebook/

Open Problems on Model Categories

Problems on model categories listed by Mark Hovey at Wesleyan University.