user:AxelBoldt

file:AxelBoldt2.JPG

My name is Axel Boldt and I teach mathematics at Metropolitan State University in Saint Paul, Minnesota. In addition to mathematics, I'm interested in molecular biology,

theoretical computer science, physics, astronomy, free software, (political) philosophy, chess, and many other things.

Since I believe that "intellectual property rights" do not exist (as we mere mortals cannot arrogate the right to own parts of Plato's eternal heaven of ideas), every word I write is by default, and always, in the public domain.

{{Babel|de|en-4|fr-1|es-1}}

Wikipedia writings

Articles

I have contributed to and taken an active interest in the following Wikipedia articles.

= Mathematics =

Abelian group --

Adjacency matrix --

Adjoint functors --

Adjugate --

Algebraic function field --

Algebraic geometry --

Algebraic structure --

Algebraically compact module --

Antiderivative --

Archimedian spiral --

Associative algebra --

Baire category theorem --

Banach space --

Banach-Tarski paradox --

Beatty's theorem --

Bernoulli inequality --

Binomial coefficient --

Binomial theorem --

Bolyai-Gerwien theorem --

Boolean algebra --

Boolean ring --

Borel algebra --

Braid group --

Cartesian closed category --

Catalan number --

Catalan's constant --

Category of abelian groups --

Category of sets --

Category of topological spaces --

Category theory --

Cauchy integral theorem --

Cauchy-Binet formula --

Cauchy's integral formula --

Central limit theorem --

Characteristic polynomial --

Chinese remainder theorem --

Closed set --

Closure operator --

Coalgebra --

Collatz conjecture --

Complex number --

Concrete category --

Conjugacy class --

Conjugate transpose --

Continued fraction --

Continuous Fourier transform --

Convergence of random variables --

Counting measure --

Covering map --

Cubic equation --

De Moivre's formula --

Derived functor --

Determinant --

Direct sum --

Directed set --

Dirichlet character --

Discrete Fourier transform --

Discrete logarithm --

Discrete valuation ring --

Discriminant of a polynomial --

Distribution --

Division algebra --

Division ring --

Dual space --

Ehrhart polynomial --

Ellipsoid --

Elliptic curve --

Elliptic function --

Endomorphism ring --

Entire function --

Euler's formula --

Euler's four-square identity --

Euler's identity --

Euler's theorem --

Euler-Maclaurin formula --

Even and odd permutations --

Exact functor --

Expected value --

Exponential function --

Extended Riemann hypothesis --

Extended real number line --

F-space --

Fast Fourier Transform --

Finite field --

Finitely generated abelian group --

First uncountable ordinal --

Fitting lemma --

Floor function --

Formal power series --

Four color theorem --

Fraction (mathematics) --

Fréchet space --

Free group --

Functor category --

Fundamental Theorem of Calculus --

Galois connection --

Gauss-Bonnet theorem --

Gauss-Jordan elimination --

Generalized mean --

Generalized Riemann hypothesis --

Geometric progression --

Greatest common divisor --

Grothendieck category --

Grothendieck topology --

Group action --

Group homomorphism --

Haar measure --

Hahn-Banach theorem --

Harmonic function --

Harmonic mean --

Harmonic series (mathematics) --

Hausdorff dimension --

Hilbert's basis theorem --

Hilbert's Nullstellensatz --

Hölder's inequality --

Hilbert's third problem --

Holomorphic function --

Homology (mathematics) --

Homotopy --

Hopf algebra --

Horner scheme --

Hyperbolic function --

Imaginary number --

Incircle and excircles of a triangle --

Indecomposable module --

Independent (probability) --

Initial object --

Injective module --

Inner automorphism --

Integral domain --

Invariance of domain --

Invariant subspace problem --

Invertible matrix --

Isomorphism of categories --

Jacobson radical --

Kadison–Singer problem --

Kleene algebra --

Kleene's recursion theorem --

Klein surface --

König's lemma --

L'Hopital's rule --

Lagrange inversion theorem --

Lambert's W function --

Landau's function --

Laplace's equation --

Lebesgue measure --

Length of a module --

Lie algebra --

Lie group --

Limit (category theory) --

Limit (mathematics) --

Line integral --

Linear congruence theorem --

Linear transformation --

Liouville's theorem --

Lipschitz continuous --

List of mathematical topics --

List of small groups --

List of statements undecidable in ZFC --

Locally compact --

Locally ringed space --

Log-normal distribution --

Logarithmic spiral --

Maximum entropy probability distribution --

Mathematical class --

Mathematics --

Matroid --

Matrix (mathematics) --

Matrix norm --

Max flow min cut theorem --

Measure of non-compactness --

Miller-Rabin primality test --

Minkowski inequality --

Minkowski's theorem --

Minor (graph theory) --

Mitchell's embedding theorem --

Modular arithmetic --

Monster group --

Monty Hall problem --

Nash embedding theorem --

Net --

Newton's method --

Nine lemma --

Normal distribution --

Normal matrix --

Normal number --

Normal space --

Nowhere dense --

Number theory --

Open map --

Open mapping theorem --

Open set --

Order (group theory) --

Order of operations --

Paracompact --

Permanent --

Pi --

Pointless topology --

Pole (complex analysis) --

Polygon --

Polynomial --

Positive definite --

Power series --

Prime ideal --

Prime number theorem --

Primitive root modulo n --

Probability density function --

Probability space --

Product (category theory) --

Product of rings --

Proportional --

Pure submodule --

Quotient ring --

Quotient space --

Rank of a matrix --

Rectifiable curve --

Reflexive space --

Regression toward the mean --

Residue (complex analysis) --

Residue theorem --

Riemannian manifold --

Riemann hypothesis --

Riemann mapping theorem --

Riemann zeta function --

Riesz representation theorem --

Ring homomorphism --

Ring ideal --

Rng --

Root of unity --

Sarkovskii's theorem --

Semi-continuous --

Semidirect product --

Shapley value --

Simple group --

Simple module --

Simply connected --

Singleton --

Slope --

Spectrum of a ring --

Stone-Weierstrass theorem --

Strong measure zero set --

Substitution rule --

Suslin's problem --

Symmedian --

Symmetric matrix --

Symmetry --

Tangent --

Tangent space --

Tarski's circle squaring problem --

Taylor series --

Taylor's theorem --

Tensor --

Theorem of Bolzano-Weierstrass --

Theorem of Heine-Borel --

Tietze extension theorem --

Tilting theory --

Topological group --

Topological ring --

Topos --

Trace of a matrix --

Triangle --

Tychonoff's theorem --

Uniform convergence --

Uniform space --

Uniformly continuous --

Unique factorization domain --

Universal property --

Urysohn universal space --

Urysohn's Lemma --

Vector --

Vector bundle --

Von Neumann regular ring --

Weierstrass-Casorati theorem --

Weierstrass transform --

Whitehead problem --

Yoneda lemma --

Zero divisor --

Zero morphism --

= Logic and Computability =

= Computing =

= Physics and Astronomy =

= Biology =

= Chemistry =

= People =

= Miscellaneous =

A Happy Death --

Amway --

Anti-prostitution pledge --

Auschwitz --

Auschwitz concentration camp --

Big Apple Oriental Tours --

Body Worlds --

Bandwagon effect --

Big Sister (brothel) --

Cavalese cable-car disaster --

Chess strategy and tactics --

Chess --

Chicken Ranch --

Cipla --

Climate changes of 535-536 --

Cognitive science of mathematics --

Daily Planet (brothel) --

Davida --

Déjà Vu (company) --

De Wallen --

Der Ackermann aus Böhmen --

dropping knowledge --

EMPOWER --

'False positives' scandal --

Fons memorabilium universi --

Fontevraud Abbey --

Frankfurt art theft (1994) --

Hoffmann-La Roche --

Holocaust --

[http://wikibooks.org/wiki/Transwiki:How_to_find_a_book How to find a book] --

Humanae Vitae --

Hunger artist --

Iron Mountain Mine --

Jade Record --

kaioo --

Kathoey --

Kapp Putsch --

Kern county child abuse cases --

Landmine --

Le Chabanais --

Lengede --

Likatier tribe --

Lusty Lady --

Matrix --

Memorial to the Murdered Jews of Europe --

Metropolitan State University --

Museo Soumaya --

Mustang Ranch --

Neutrality Acts of 1930s --

Nigerian money transfer fraud --

OBJECTIVE: Christian Ministries --

Ohio v. Dalton --

Operation Coffee Cup --

Paro (robot) --

Pascha (brothel) --

People v. Jovanovic --

Phar-Mor --

Philosophy of mathematics --

Platz der Republik (Berlin) --

Polygraph --

Pornography --

Potsdam Conference --

Prosecutor's fallacy --

Prostitution --

Prostitution in Germany --

Prostitution in Nevada --

Pulsed Energy Projectile --

Quixtar --

Red-eye effect --

Refugee kidnappings in Sinai --

Royal Library, Copenhagen --

Saints Innocents Cemetery --

Santorum Amendment --

Shady Lady Ranch --

Shell game --

Siddhartha --

Slogan 'AIDS Kills Fags Dead' --

Solingen arson attack of 1993 --

Snoezelen --

Spiral Island --

TAMPEP --

Tenrikyo --

The 120 Days of Sodom --

The Kreutzer Sonata --

The Myth of Sisyphus --

The Spectator Magazine --

Thumbnail gallery post --

Tiger Temple --

US Copyright Group --

Vatican Library --

WebMoney Transfer --

Whistled speech --

Wodaabe --

Wonderland Murders --

WordNet --

Yab Yum --

= Wikipedia =

[[Wikipedia:Errors_in_the_Encyclop%C3%A6dia_Britannica_that_have_been_corrected_in_Wikipedia|Making

fun of Britannica]] --

Wikipedia:How to edit a page --

Wikipedia:Searching --

Wikipedia:WikiMoney

Awards

Image:Original_Barnstar.png|I award you this barnstar for the consistently excellent quality of your thousands of contributions, for your many articles on mathematics and a whole range of other topics, and for being in all respects one of Wikipedia's finest contributors. — Trilobite

Image:Tireless_Contributor_Barnstar.gif|I hearby grant you this barnstar for the splendid contributions you made in Wikipedia. Keep it up! Siva1979 14:46, 11 February 2006 (UTC)

Image:Original_Barnstar.png|A barnstar for your excellent work in all aspects of Wikipedia. Gflores 12:33, 13 March 2006 (UTC)

Image:Tutnum5.jpg|This editor is a Grand and Glorious Tutnum of the Encyclopedia, and is entitled to display this Book of Knowledge with Coffee Cup Stain, Cigarette Burn, Chewed Broken Pencil, and Note From Jimbo

Image:Barnstar-atom3.png|Awarded to AxelBoldt, for being an outstanding contributor with a plethora of fine contributions, particularly to mathematics articles, the barnstar of math and science. Herostratus 17:20, 13 March 2007 (UTC)

Image:Original_Barnstar.png|I award this barnstar to AxelBoldt for giving us WikiMoney! (Sorry this is a bit late.) Einsteinewton 05:57, 7 November 2007 (UTC)

Image:RAF-Logo.svg?|The Geist über Geld barnstar is awarded to those editors who place the Human Spirit above Material possessions. RatSkrew 03:53, 22 May 2008 (UTC)

Image:Original_Barnstar.png|Brewcrewer, a newpage patroller, rarely comes across any great new articles, but when he does, like the Solingen arson attack of 1993, he can't help but plaster its creator's talk page with a barnstar. brewcrewer (yada, yada) 04:52, 27 May 2008 (UTC)

Image:Lemke dunkel beer in glass.jpg|A beer for correcting English grammar, for example in [http://de.wikipedia.org/wiki/Benutzer:NetAction/WikiTrust WikiTrust]! [http://de.wikipedia.org/wiki/Benutzer:NetAction NetAction] 29 Aug. 2011

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|style="font-size: x-large; padding: 0; vertical-align: bottom; height: 1.1em;" | The E=mc² Barnstar

style="vertical-align: top; border-top: 1px solid gray;" | for your many mathematical contributionsReaperLF (talk) 21:06, 28 January 2018 (UTC)

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|rowspan="2" style="vertical-align: middle; padding: 5px;" | 100px

|style="font-size: x-large; padding: 3px 3px 0 3px; height: 1.5em;" | The Writer's Barnstar

style="vertical-align: middle; padding: 3px;" | To the amazing author who started the Hubble Space Telescope wiki page. I commend you. Rexlikescheese (talk) 21:02, 24 July 2018 (UTC)

{{userpage}}

AxelBoldt

AxelBoldt

AxelBoldt