Place name

• The German name of Lubsko
  Lubsko
  Lubsko is a town in Żary County in the Lubusz Voivodeship in western Poland. It is the administrative seat of the Gmina Lubsko and has a population of 15,370 as of February 1, 2005.- History :...
  
  , Poland
• Sommerfeld, A German town now a district of Leipzig
  Leipzig
  Leipzig Leipzig has always been a trade city, situated during the time of the Holy Roman Empire at the intersection of the Via Regia and Via Imperii, two important trade routes. At one time, Leipzig was one of the major European centres of learning and culture in fields such as music and publishing...
  
   (d)

Family name

• Arnold Sommerfeld
  Arnold Sommerfeld
  Arnold Johannes Wilhelm Sommerfeld was a German theoretical physicist who pioneered developments in atomic and quantum physics, and also educated and groomed a large number of students for the new era of theoretical physics...
  
   (1868 - 1951), a German physicist who is one of the founders of the quantum mechanics
  • Sommerfeld expansion
    Sommerfeld expansion
    A Sommerfeld expansion is an approximation method developed by Arnold Sommerfeld for a certain class of integrals which are common in condensed matter and statistical physics...
    
    , a method for approximating integrals used in statistical and solid-state physics, due to Arnold Sommerfeld
  • Sommerfeld
    Sommerfeld (crater)
    Sommerfeld is a large lunar crater that is located in the far northern latitudes of the Moon. It lies on the far side, and can only be viewed from orbit. To the south of Sommerfeld is Rowland, a crater about the same size as Sommerfeld...
    
    lunar crater