PJTraill

I, Patrick Traill, am an Englishman, born in Aberdeen, Scotland, brought up in Ivybridge and Hele (near Bradninch) (both in Devon, England), educated in Merton College, Oxford, having lived in London, England, Göttingen, Beverwijk, Haarlem and Lobberich, currently living in Germany, married to a German wife and now retired, having worked until retirement in Amsterdam (in the Netherlands) and at home.
I failed to become a mathematician and was a moderately proficient computer programmer, which provided me with my job until my relatively recent retirement.
My dormant interests include rock- and tree-climbing and the ancient game of tennis; interests revived since my retirement include the board game Go and the modern descendant of tennis, lawn tennis. I am actively interested in programming languages and passively, alas, in mathematics. I enjoy listening to such music as Franz Schubert, Leonard Cohen and Bruce Springsteen have produced, and trying (in near-complete privacy) to reproduce that of the first.
I am an agnostic, tending to atheism, by which I mean that I have been unable to convince myself whether there is a god (rather than that I am convinced that one cannot establish it), but tend to assume that there is (unfortunately) no such person as the benevolent ideal and (fortunately) no such as the disagreeable manifestation.
The contributor User:Livedevilslivedevil has suggested I mention that he is my son, which I am very glad to do.

Language skill box with Babel templates:	Programming skills
Babel user information en-N This user has a native understanding of English. de-3 Dieser Benutzer beherrscht Deutsch auf hohem Niveau. nl-3 Deze gebruiker heeft gevorderde kennis van het Nederlands. fr-1 Cet utilisateur dispose de connaissances de base en français. es-1 Este usuario tiene un conocimiento básico del español. it-1 Questo utente può contribuire con un livello elementare in italiano. ru-1 Этот участник владеет русским языком на начальном уровне. Users by language	bash-3This user is an advanced Bash programmer. C-4This user is an expert C programmer. C++-3This user is an advanced C++ programmer. C#-3This user is an advanced C# programmer. COBOL-2This user is an intermediate COBOL programmer. for-2This user is an intermediate Fortran programmer. Java-3This user is an advanced Java programmer. lexThis user can write Lex. pas-3This user is an advanced Pascal programmer. SQL-3This user is an advanced SQL programmer. yaccThis user can write Yacc.
This user plays real tennis. This user is a Go player.	This user contributes using Firefox. This user contributes using Linux.
This user has been editing Wikipedia for more than ten years. This user has a page on MediaWiki. This user has created a global account. PJTraill's main account is on Wikipedia (in English).

Original articles

Computer Science

• Circle-ellipse problem
• GIWS (software)

Tennis

Courts

• Merton Street tennis court Where I used to play while an undergraduate
• Oriel Square tennis court (defunct)
• Prince's Club
• Royal Tennis Court, Hampton Court
• Category:Defunct real tennis venues

Players

• Fred Covey
• Walter Kinsella

Miscellaneous

• Hele, Devon – where I used to live
• Trail commission – was something I wanted to know about
• Vladimir Jankélévitch (not that I knew anything about him, I just translated the German)
• Graded (mathematics) – I forget why, I presumably encountered an unclear use of the term
• Woldemar Gerschler – translated from German, since I came across him under High-intensity interval training (I think)
• Carel S. Scholten – since he was a co-author of a book on Predicate transformer semantics
• Victor Anatolyevich Vassiliev because I saw the red links, and found it interesting
• Ethisphere Institute – because it is frequently mentioned (on and off Wikipedia) and I wanted to know how reliable it was
• Institute of Applied Mathematics – as that was the link I first made for Victor Anatolyevich Vassiliev for the Keldysh Institute of Applied Mathematics
• Ratelband List
• this (duh)
• Blockbusting (game)
• David Wolfe (mathematician)
• Cooling and heating (combinatorial game theory) – to satisfy references
• Meier Eidelheit ‎– translated from the German
• Bettering the Evaluation and Care of Health – to explain a name used in Binge drinking
• APIB ‎– to explain this acronym for Soviet fighter-bomber regiments

Redirects

Nanhi Kali, Network prefix, Patrik Johnestoun, Planetary wave resonance, Racing Demons, Sialolith, Skyhook (tennis), BEACH

Damp(ish) squibs

• Credence - because it comes into the Sleeping Beauty problem - but it got scrapped, then created as a disambiguation page.
• Chroot prison - but it already existed as chroot, so now it is just a redirect.
• Sleeping Beauty problem - though I later realised that there was already Sleeping beauty paradox, which then got merged into this

Various other contributions

• Islamic schools and branches - Supplied the lead (as at 2015-01-16T23:25:11) by condensing the article … but this appears to have offended someone who has reverted it!
• Corn (medicine) - Repaired on 2014-09-01 in article Corn vandalism from 2006-08-02 in article Callus, noting a record for the longest lived vandalism as of the former date.

Test cases

Saint Petersburg map

Re Talk:Ozerki_(Historic_district_in_Saint_Petersburg)#Map_is_of_Africa,_not_Saint_Petersburg: