# User contributions

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- 01:29, 29 November 2010
(diff | hist) . .
**(+1,807)** . . Dedekind domain (→Invertibility of Ideals) - 00:58, 29 November 2010
(diff | hist) . .
**(+5,701)** . . Dedekind domain (Invertibility of ideals) - 23:25, 28 November 2010
(diff | hist) . .
**(+1,613)** . . N Fractional ideal (Created page with 'Given an integral domain <math>R</math> with field of fractions <math>K</math>, a '''fractional ideal''', <math>I</math>, of <math>R</math> is an <math>R</math>-[[module|…') - 14:43, 13 December 2009 (diff | hist) . . (+15) . . m Fundamental group (→Homotopy invariance)
- 03:13, 13 December 2009
(diff | hist) . .
**(+3,652)** . . Fundamental group (functoriality and homotopy invariance) - 02:17, 13 December 2009
(diff | hist) . .
**(+1,736)** . . Fundamental group - 01:43, 13 December 2009
(diff | hist) . .
**(+528)** . . Fundamental group (re-wrote article a bit) - 01:09, 13 December 2009 (diff | hist) . . (+55) . . m Fundamental group (add category)
- 01:08, 13 December 2009
(diff | hist) . .
**(+2,402)** . . Nm Fundamental group (split off from algebraic topology article) - 04:17, 5 November 2009 (diff | hist) . . (+488) . . Heine-Borel Theorem (This only holds for R^n, not for general metric spaces)
- 17:19, 8 September 2009 (diff | hist) . . (0) . . m Algebra (structure) (current)
- 23:05, 23 August 2009
(diff | hist) . .
**(+5,578)** . . Unique factorization domain (Proof that PID=>UFD) (current) - 21:24, 23 August 2009
(diff | hist) . .
**(+961)** . . N Unique factorization domain (Definition) - 21:07, 23 August 2009
(diff | hist) . .
**(+928)** . . N Prime element (Created page with 'In ring theory an element <math>p</math> of an integral domain <math>R</math> is said to be '''prime''' if: * <math>p</math> is not a unit. * If <math>p|ab</math> for any…') (current) - 20:42, 23 August 2009
(diff | hist) . .
**(+1,504)** . . N Irreducible element (Created page with 'In ring theory a element <math>r</math> of a ring <math>R</math> is said to be '''irreducible''' if: * <math>r</math> is not a unit. * <math>r</mat…') (current) - 20:16, 23 August 2009 (diff | hist) . . (+446) . . N Unit (ring theory) (Created page with 'In ring theory we say that an element <math>u</math> of a ring <math>R</math> is a '''unit''' if it has an inverse in <math>R</math>, that is, if there is another ele…') (current)
- 19:50, 23 August 2009 (diff | hist) . . (+497) . . Maximal ideal (maximal=>prime) (current)
- 19:46, 23 August 2009 (diff | hist) . . (+9) . . m Prime ideal (stub)
- 19:42, 23 August 2009 (diff | hist) . . (+26) . . m Prime ideal (category)
- 19:41, 23 August 2009
(diff | hist) . .
**(+856)** . . N Prime ideal (Created page with 'In ring theory we say that an ideal <math>P</math> of a ring <math>R</math> is '''prime''' if <math>P\ne R</math> and for any ideals <math>I,J\subseteq R</math> with …') - 15:28, 22 August 2009
(diff | hist) . .
**(+873)** . . Euclidean domain (Proof that a Euclidean domain is a PID) (current) - 14:59, 22 August 2009
(diff | hist) . .
**(+688)** . . Euclidean domain (Formal definition/examples) - 22:26, 21 August 2009
(diff | hist) . .
**(+1,007)** . . N Fermat prime (Created page with 'If <math>n</math> is a nonnegative integer the <math>n^{th}</math> '''Fermat number''' is defined to be <math>F_n = 2^{2^n}+1</math>. If <math>F_n</math> is prime, then it is kn…') - 16:07, 21 August 2009 (diff | hist) . . (+49) . . m Constructible polygon (categories) (current)
- 16:05, 21 August 2009
(diff | hist) . .
**(+5,120)** . . N Constructible polygon (Definition and classification) - 01:18, 21 August 2009
(diff | hist) . .
**(+2,922)** . . N Tower law (Statement and proof) - 00:38, 21 August 2009
(diff | hist) . .
**(+4,785)** . . Constructible number (Proof (could probably be cleaned up a bit)) - 23:26, 20 August 2009
(diff | hist) . .
**(+2,062)** . . Constructible number (Statement of theorem) - 22:44, 20 August 2009 (diff | hist) . . (-14) . . m Constructible number (slightly different statement of definition)
- 22:26, 20 August 2009 (diff | hist) . . (+49) . . m Constructible number (categories)
- 22:23, 20 August 2009
(diff | hist) . .
**(+673)** . . N Constructible number (Definition) - 21:34, 20 August 2009
(diff | hist) . .
**(+1,923)** . . N Minimal polynomial (definition and existance/uniqueness) - 21:13, 20 August 2009
(diff | hist) . .
**(+654)** . . Three Greek problems of antiquity - 15:20, 7 June 2009 (diff | hist) . . (+63) . . Three Greek problems of antiquity (Um cos 20 is algebraic)
- 17:58, 28 March 2009 (diff | hist) . . (+22) . . m Metric (analysis) (category)
- 17:57, 28 March 2009 (diff | hist) . . (+22) . . m Neighborhood (category)
- 17:56, 28 March 2009 (diff | hist) . . (+22) . . m Arbitrarily close (category) (current)
- 17:55, 28 March 2009 (diff | hist) . . (+22) . . m Continuity (category)
- 17:50, 28 March 2009 (diff | hist) . . (+22) . . m Limit point (category) (current)
- 17:49, 28 March 2009 (diff | hist) . . (+23) . . m Euclidean metric (category) (current)
- 17:48, 28 March 2009 (diff | hist) . . (+23) . . m Discrete metric (category) (current)
- 17:47, 28 March 2009 (diff | hist) . . (+22) . . m Metric space (category)
- 17:41, 28 March 2009 (diff | hist) . . (+31) . . m Meromorphic (category) (current)
- 17:39, 28 March 2009 (diff | hist) . . (+30) . . m Entire (category) (current)
- 17:38, 28 March 2009 (diff | hist) . . (+31) . . m Holomorphic function (category)
- 17:43, 26 March 2009
(diff | hist) . .
**(+2,467)** . . Polynomial ring (Formal definition) - 00:51, 25 March 2009 (diff | hist) . . (+185) . . N Polynomial ring (New page: Given a (commutative) ring <math>R</math>, the polynomial ring <math>R[x]</math> is, informally, "the ring of all polynomials in <math>x</math> with coefficients in <math>R</math>.")
- 00:46, 25 March 2009 (diff | hist) . . (+39) . . m Field extension (current)
- 00:43, 25 March 2009 (diff | hist) . . (+471) . . N Maximal ideal (New page: In ring theory, a '''maximal ideal''' of a ring <math>R</math> is a proper ideal <math>I\le R</math> which is not contained in any other proper ideal of <math>R</math>. (That i...)
- 00:12, 25 March 2009 (diff | hist) . . (+23) . . m Fundamental Theorem of Calculus (add category)
- 02:06, 21 March 2009 (diff | hist) . . (+185) . . Nm Principal ideal domain (someone who is less lazy than me should write this) (current)
- 02:03, 21 March 2009 (diff | hist) . . (+55) . . m Bezout's Lemma (Added categories)
- 02:01, 21 March 2009
(diff | hist) . .
**(+1,722)** . . Bezout's Lemma (Generalization for PIDs) - 01:39, 21 March 2009
(diff | hist) . .
**(+506)** . . Bezout's Lemma (Added proof that g minimal) - 01:33, 21 March 2009 (diff | hist) . . (+254) . . Bezout's Lemma (Generalized statement/proof to hold for any nonzero integers)
- 01:05, 21 March 2009 (diff | hist) . . (+28) . . m Quadratic residues
- 00:52, 21 March 2009 (diff | hist) . . (+29) . . m Matrix
- 00:51, 21 March 2009 (diff | hist) . . (+28) . . m Linear algebra (current)
- 00:51, 21 March 2009 (diff | hist) . . (+62) . . Nm Category:Linear algebra (New page: This category includes articles related to linear algebra.) (current)
- 00:47, 21 March 2009 (diff | hist) . . (+58) . . m Vector space (added categories) (current)
- 20:39, 4 February 2009 (diff | hist) . . (-5) . . m USAMO historical results (There were no perfect scores on the 2008 IMO)
- 20:25, 4 February 2009 (diff | hist) . . (+8) . . m Module (stub)
- 20:23, 4 February 2009
(diff | hist) . .
**(+902)** . . N Module (Definition) - 20:03, 4 February 2009 (diff | hist) . . (-36) . . m Set theory (I wouldn't consider set theory to be part of abstract algebra)
- 21:20, 9 September 2008 (diff | hist) . . (+27) . . m Algebraically closed (Add category)
- 21:18, 9 September 2008 (diff | hist) . . (+54) . . m Number field (Add categories) (current)
- 21:17, 9 September 2008 (diff | hist) . . (+31) . . m Category:Field theory (Add category) (current)
- 19:05, 9 September 2008 (diff | hist) . . (+26) . . m Euclidean domain (Add category)
- 19:05, 9 September 2008 (diff | hist) . . (+38) . . m Skew field (Add categories) (current)
- 19:03, 9 September 2008 (diff | hist) . . (+36) . . m Noetherian (Add category)
- 19:02, 9 September 2008 (diff | hist) . . (+36) . . m Integral closure (Add category) (current)
- 19:01, 9 September 2008 (diff | hist) . . (+24) . . m Commutative ring (Add category)
- 18:57, 9 September 2008 (diff | hist) . . (+25) . . m Omega ring (Add category) (current)
- 18:53, 9 September 2008 (diff | hist) . . (+13) . . m Free group (Add category)
- 18:50, 9 September 2008 (diff | hist) . . (+17) . . m Homogeneous principal set (Link to group action article)
- 18:49, 9 September 2008 (diff | hist) . . (+17) . . m Burnside's Lemma (Link to group action article)
- 18:48, 9 September 2008 (diff | hist) . . (+17) . . m Orbit-stabilizer theorem (Link to group action article)
- 18:47, 9 September 2008 (diff | hist) . . (+17) . . m Stabilizer (Link to group action article) (current)
- 18:47, 9 September 2008 (diff | hist) . . (+17) . . m Fixer (Link to group action article) (current)
- 18:45, 9 September 2008 (diff | hist) . . (+17) . . m Homogeneous set (current)
- 17:07, 8 September 2008
(diff | hist) . .
**(+2,378)** . . N Opposite category (Wrote definition and talked (informally) about the duality principle.) (current) - 21:55, 7 September 2008 (diff | hist) . . (+14) . . m Fiber product (Better to use category theory terminology) (current)
- 21:45, 7 September 2008 (diff | hist) . . (+27) . . m Automorphism (It's easier just to define this interms of isomorphisms. Also, there are examples of categories where (the generalization of) the old statement isn't true.) (current)
- 21:17, 7 September 2008
(diff | hist) . .
**(+2,271)** . . Group action (Talked about group actions on other objects) (current) - 20:02, 7 September 2008 (diff | hist) . . (+27) . . m Least common multiple (added category)
- 19:59, 7 September 2008 (diff | hist) . . (+146) . . Talk:Goldbach's conjecture (current)
- 16:44, 7 September 2008 (diff | hist) . . (+32) . . m Orbit (Made notation consistent with the group action article) (current)
- 16:33, 7 September 2008 (diff | hist) . . (+36) . . m Orbit
- 16:29, 7 September 2008 (diff | hist) . . (+11) . . m Cayley's Theorem
- 16:20, 7 September 2008 (diff | hist) . . (+36) . . m Cayley's Theorem
- 15:27, 7 September 2008 (diff | hist) . . (-2) . . m Group action
- 15:26, 7 September 2008 (diff | hist) . . (+6) . . m Group action
- 15:25, 7 September 2008
(diff | hist) . .
**(+2,787)** . . N Group action (New page: In mathematics, groups often arise as (a subsets of) the set of permutations of some mathematical object (where the group multiplication law is just composition). So...) - 01:31, 7 September 2008 (diff | hist) . . (+374) . . N Talk:Quotient group (New page: I think it would be better (and more standard) for this article to focus on explicitly constructing the quotient group <math>G/H</math> (where <math>H</math> is a normal subgroup) and desc...) (current)
- 22:23, 6 September 2008 (diff | hist) . . (-18) . . m De Moivre's Theorem
- 01:33, 6 September 2008 (diff | hist) . . (+41) . . m Topology (current)
- 20:52, 5 September 2008
(diff | hist) . .
**(+2,462)** . . N Field of fractions (New page: Given an integral domain, <math>R</math>, we may informally define the '''field of fractions''' of <math>R</math> (also called the '''fraction field''' or the '''quotient field'''), de...) (current) - 17:29, 5 September 2008 (diff | hist) . . (+426) . . N Domain (Ring theory) (New page: A ring, <math>R</math>, is an '''domain''' if: * <math>0\neq 1</math> (where <math>0</math> and <math>1</math> are the additive and multiplicative identities, respectively) * and it c...) (current)
- 17:26, 5 September 2008 (diff | hist) . . (+25) . . m Integral domain
- 17:25, 5 September 2008 (diff | hist) . . (+25) . . m Zero divisor (current)

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