Flachmacher

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German

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Etymology

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Either flachmachen +‎ -er or flach +‎ Macher, literally flat maker. Named such because these mappings make the manifold geometrically trivial; they iron, straighten or flatten it, intuitively speaking.

Pronunciation

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  • IPA(key): /ˈflaxˌmaxəʁ/, [ˈflaχˌmaχɐ]
  • Audio:(file)
  • Hyphenation: Flach‧ma‧cher

Noun

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Flachmacher m (strong, genitive Flachmachers, plural Flachmacher)

  1. (differential geometry) coordinate chart
    Synonym: Karte
    • 2011 January 15, Klaus Jänich, Mathematik 2: Geschrieben für Physiker (Springer-Lehrbuch)‎[1], Springer-Verlag, →ISBN, →OCLC, page 103:
      Einen solchen Diffeomorphismus wollen wir, seiner anschaulichen Bedeutung nach, auch einen Flachmacher für um nennen. In einer anderen Sprechweise heißt ein Flachmacher eine äußere Karte für um , im Unterschied nämlich zur zugehörigen inneren Karte : []
      We want to additionally call such a diffeomorphism , in accordance with its illustrative meaning, a flat maker for around . In another mode of speaking, a flat maker is also named an outer chart for around , in contrast namely to the corresponding inner chart : []

Usage notes

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  • More commonly used in introductory university classes and introductory literature because of its highly self-explanatory nature.

Declension

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