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User:Georg Fischer

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CV

  • 1947 born in Waldshut, southern Germany.
  • 1968 - 1975 Studies of Mathematics in Freiburg, and Computer Science in München, Germany.
  • 1976 Software engineer at Softlab GmbH, München
  • 1977 - 1980 Assistant at the Department of Computer Science, Dortmund, Germany. PhD in Compiler Construction: Incremental LR(1) Parser Construction as an Aid to Syntactical Extensibility
  • 1980 - 1985 Chief consultant again at Softlab GmbH
  • 1986 - 1994 Owner and Technical CEO at punctum GmbH, Munich (with two partners)
  • 1995 - 1998 Maintenance and marketing of converter software
  • 1999 - 2004 Freelancer in Y2K and other major conversion projects at Commerzbank
  • 2005 - 2012 Principal Database Engineer at Commerzbank AG, Frankfurt, Germany
  • 2012 - retired
  • 2017 - IT-related development projects: microfinance database in Madagascar, Java programming training on Java (Bekasi, Indonesia)

Interests

OEIS

Please see teherba.org for my current OEIS activities, among them:

  • Broken link checking and repairing in 2009, and occasionally, e.g.: 28 sequences citing M. Latapi
  • Knuth's sequence A220952, and generation of similiar FASS curves
  • A003121 Number of ways to arrange the numbers 1,2,...,n(n+1)/2 in a triangle so that the rows interlace, and modified Problem 18 of Clark Kimberling: 1, 2, 10, 1744, 2002568, 42263042752
  • A131393 and 47 similiar "positive/negative" sequences A1313xx, A257nnn of Clark Kimberling

Programming

  • Java, database, web applications, programming languages (speaking ALGOL 60, FORTRAN, PL/1, Pascal, Simula 67, C, Perl, Java, XSLT, SQL, JavaScript, understanding COBOL)
  • Symbolic computation (c.f. https://github.com/gfis/ramath)

Number Theory

  • Diophantine equations, especially power sums
  • Fermat's lost proofs (except for FLT) with infinite descent