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User:Charles R Greathouse IV/Consistency
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Searches to do
This is a list of database searches that suggest changes of some sort.
- link:"/index/Rec" -keyword:easy: Linear recurrences are, by their nature, easy to compute.
- "digits are, in order, the first n terms of the periodic sequence" -keyword:easy: A few hundred sequences that are actually linear recurrences. Most of these need both keyword:easy and their signature.
- name:walk -keyword:walk
- xref:A000027 (many are needless)
- "Jan 1", "Jan 2", ..., "Dec 9"
- Riordan array -keyword:tabl
- "triangle read by rows" -keyword:tabf -keyword:tabl
- ref:http and comment:http (links should go in links section)
- trisection|quadrisection|quintisection|heptasection|octosection (many are cruft)
- name:"continued fraction" -keyword:cofr -keyword:cons -convergent -period
- link:"linear recurrences" link:"constant coefficients" -link:reclcc
- ref:arxiv
- link:"Tanya Khovanova" link:"Recursive Sequences" -link:"linear recurrences with constant coefficients"
- link:"front.math.ucdavis.edu" (link to the arXiv instead)
Regular expressions to do
-
\(PARI\).*[^&\s]\s*&\s*[^&\s]
(use of old-style&
rather than&&
in GP)
Searches completed
At some point I may want to re-do these checks, but the low-hanging fruit is gone.
- keyword:full -keyword:fini
- wathworld - probably MathWorld
- digit -keyword:base - This was a difficult and tedious search. I hope that from now on contributors are more careful with this keyword so I don't have to do this again.
- substraction|substract|sustraction|sustract: Common misspellings among French-speakers
- "Mathematic program" (usually Mathematica)
- name:"decimal expansion" -keyword:dead -keyword:cons -keyword:base -keyword:cofr -seq:10 -seq:11 -seq:12 -seq:13 -seq:14 -seq:15 -seq:16 (constants not marked with cons)
- Typos like divisble
- link:"TITLE FOR LINK", the default name of an a-file
- "square-free": Spelling should be "squarefree" except in citations and in describing the correct spelling.
Semi-automated tests
- I've checked the database for sequences which 'seem like' decimal expansions of constants but do not have keyword:cons. I wrote a program which queried stripped.gz and found sequences which had only terms 0..9 and which were approximately normal (did not fail a chi-square test) and for which the first differences were also approximately normal. Using an old copy of the database (better than nothing!) I removed those which at that point had keyword:cons then searched for remaining sequences. I found and fixed about 50 sequences this way.
- I've checked the database for sequences which claim to be multiplicative but aren't. At some point I should also check for sequences that appear to be multiplicative but aren't marked. Perhaps I can even check for divisibility sequences the same way.