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Warning: Undefined array key "media" in /var/www/html/feed.php on line 419 Random bits of knowledge matematik
https://wiki.20dage.dk/
2024-11-21T09:28:32+00:00Random bits of knowledge
https://wiki.20dage.dk/
https://wiki.20dage.dk/lib/tpl/dokuwiki/images/favicon.icotext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:algoritmer
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Algortimer
* N'th squarefree numbertext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:b-file_analyse
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Tilbage til matematik
B-files analyse
Jeg har kigget på b000001.txt til b321963.txt.
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Stats
* 172.234 “b-file synthesized from sequence entry”
* 145.911 ikke “synthesized”
* 3.818 a- og b-filer mangler. Dvs. alle fra 306.183 til 310.000
Problemertext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:collatz
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* Collatz Factoring
* Collatz Problem of Positive Integers
* Highest Steps
* OEIS Indextext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:erdoes_paul
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----------
Paul Erdös
En film om Paul Erdös: N is a numbertext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:euler_problemer
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----------
Euler problemer
Se NumSeq moduler på cpan: <http://search.cpan.org/~kryde/Math-NumSeq-61/>
Nayjukis løsninger med forklaringer og java-source <http://nayuki.eigenstate.org/page/project-euler-solutions>
* Hurtig Eulers totient funktion
* Find prime factors
* Problem 258 - lagged fibonacci
* E549 -Divisibility of factorials
* Carmichael's totient function conjecturetext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:fermat
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----------
v=7FnXgprKgSEtext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:fibonacci
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Fibonacci
* Lagged fibonacci
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Formula til non-Fibonacci tal:text/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:fraktaler
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Fraktaler
* Kalles fraktaler
* <https://randomascii.wordpress.com/2011/08/13/faster-fractals-through-algebra/>text/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:integration
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Integration
* How to solve EVERY trigonometric substitution
* Trigonometric substitution with sinetext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:jokes
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Jokestext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:kolakoski_sequence
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Kolakoski Sequence
* bit tricks instead of recursiontext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:konstanter
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Matematiske konstanter
<http://www.gutenberg.org/ebooks/634>text/html2023-10-21T19:19:09+00:00Anonymous (anonymous@undisclosed.example.com)matematik:logik
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Logik
* Modal Logictext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:maengdelaere
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Mængdelære
notin:
in:
inter:
union:
exists:
forall:
subset:(subset)
notsubset:(notsubset)
propersubset:
notpropersubset:
superset:(superset)
notsuperset:(notsuperset)
propersuperset:(propersuperset)
notpropersuperset:(notpropersuperset)text/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:mandelbrot
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Mandelbrot
* Mandelbrot rendering
* Superfractalthing Maths
* Algorithmics Worlds
* C. S. Larsen - JS Mandelbrot
* Mandelbrot - tiles API
* Buddhabrottext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:manglende_artikler_om_heltal
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Tilbage til Artikler på Wikipedia med spændende matematik
----------
Manglende matematik artikler på wikipedia
* 1002
1002 is a 17-gonal Number.
1002 is a 335-gonal Number.
1002 is a Centered 11-gonal Number.
22 can be Partitioned in 1002 ways.
* <http://oeis.org/A006394>
* <http://oeis.org/A005963>
* <http://oeis.org/A006951>
* <http://oeis.org/A000041>
* <http://oeis.org/A004114>
* <http://oeis.org/A035480>
* <http://oeis.org/A039449>text/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:mathsyntax
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Math Publish examples
Math publisher Help Page
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* Matrix Multiplicationtext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:oeis
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----------
* Kolakoski sequence
* Ulam numbers
On-Line Encyclopedia of Integer Sequences
* b-file analyse
Registrans
* Confirm
----------
Jeg vil måske lave en DVD med OEIS. Flyingant skal være på dvd'en.
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Sekvenser med 2,3 eller 4 forskellige værdier. Nogle af dem kunne være interessante grafiske.text/html2023-10-21T19:19:06+00:00Anonymous (anonymous@undisclosed.example.com)matematik:oeis_med_primtal
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OEIS Primal
* A137613
* A221869
* A167195
* A167170
* <http://arxiv.org/abs/0910.4676>text/html2023-10-21T19:19:09+00:00Anonymous (anonymous@undisclosed.example.com)matematik:pi
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PI
* Bailey–Borwein–Plouffe Formulatext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:primtal
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Primtal
* Finde alle faktorer
* OEIS, der genererer primtal
* A natural prime-generating recurrence
* Generalizations of the Rowland theorem
* Factor DB
* Zhi-Wei Sun
* Primality Testing code
* Glitch Primes and Cyclops Numberstext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:primtal_faktorer
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Prime Factorization
* Pollard's Rho algorithmtext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:puzzles
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Puzzles
* Latin Puzzles
* There is no 16-Clue Sudokutext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:ramanujan_srinivasa
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RAMANUJAN SRINIVASA
v=OARGZ1xXCxstext/html2023-10-21T19:19:06+00:00Anonymous (anonymous@undisclosed.example.com)matematik:recreational_mathematics
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----------
Recreational Mathematics
* Ludus Opusculatext/html2023-10-21T19:19:06+00:00Anonymous (anonymous@undisclosed.example.com)matematik:start
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Matematik
* The Benford Online Bibliography
* Algoritmer
* Collatz
* Erdös, Paul
* Euler problemer
* Fermat
* Fibonacci
* Fraktaler
* Integration
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* Wikipedia…text/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:statistik
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Statistik
Anscombe's quartettext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:store_spaendende_tal
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Store (>1.000.000) spændende tal
* 2147483647
* 9814072356
* 443372888629441 = 17·31·41·43·89·97·167·331 - mindste strong Fibonacci pseudoprime
* , største kendte (sep. 2016) primtalstvilling.
* Skewes' number
* Graham's number
* 121213882349 =
* 128711132649 = (1287 + 1113 + 2649)^3text/html2023-10-21T19:19:06+00:00Anonymous (anonymous@undisclosed.example.com)matematik:tal-typer
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Tal-typer
Primtal
* Mersenne prime
* Interprime
* Cousin prime
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* Newman–Shanks–Williams prime
* Pillai prime
* Ramanujan prime
* Wilson prime
Fibonacci
* Fibonaccitext/html2023-10-21T19:19:06+00:00Anonymous (anonymous@undisclosed.example.com)matematik:tidsskrifter
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Matematiske tidsskrifter
* FAMØStext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:tilfaeldige_tal
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Tilfældelige tal
* rand() Considered Harmful video
* Non-Uniform Random Variate Generation
* A Million Random Digits with 100,000 Normal Deviates
* Random number book
* RANDU
* Pseudorandom binary sequence
* Books of random numbers - How were the numbers generated?text/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:topologi
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Topologi
En video om at vende en kugle inside-out: Youtubetext/html2023-10-21T19:19:07+00:00Anonymous (anonymous@undisclosed.example.com)matematik:ulam_numbers
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Ulam numbers
* An Efficient Method for Computing Ulam Numberstext/html2023-10-21T19:19:08+00:00Anonymous (anonymous@undisclosed.example.com)matematik:wikipedia_artikler
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Artikler på Wikipedia med spændende matematik
* Manglende artikler om heltal
* Artikler, der burde forbedres